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// Generated by jextract

package org.purejava.appindicator;

import java.lang.invoke.*;
import java.lang.foreign.*;
import java.nio.ByteOrder;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

import static java.lang.foreign.ValueLayout.*;
import static java.lang.foreign.MemoryLayout.PathElement.*;

/**
 * {@snippet lang=c :
 * struct _GtkNotebookClass {
 *     GtkContainerClass parent_class;
 *     void (*switch_page)(GtkNotebook *, GtkWidget *, guint);
 *     gboolean (*select_page)(GtkNotebook *, gboolean);
 *     gboolean (*focus_tab)(GtkNotebook *, GtkNotebookTab);
 *     gboolean (*change_current_page)(GtkNotebook *, gint);
 *     void (*move_focus_out)(GtkNotebook *, GtkDirectionType);
 *     gboolean (*reorder_tab)(GtkNotebook *, GtkDirectionType, gboolean);
 *     gint (*insert_page)(GtkNotebook *, GtkWidget *, GtkWidget *, GtkWidget *, gint);
 *     GtkNotebook *(*create_window)(GtkNotebook *, GtkWidget *, gint, gint);
 *     void (*page_reordered)(GtkNotebook *, GtkWidget *, guint);
 *     void (*page_removed)(GtkNotebook *, GtkWidget *, guint);
 *     void (*page_added)(GtkNotebook *, GtkWidget *, guint);
 *     void (*_gtk_reserved1)(void);
 *     void (*_gtk_reserved2)(void);
 *     void (*_gtk_reserved3)(void);
 *     void (*_gtk_reserved4)(void);
 *     void (*_gtk_reserved5)(void);
 *     void (*_gtk_reserved6)(void);
 *     void (*_gtk_reserved7)(void);
 *     void (*_gtk_reserved8)(void);
 * }
 * }
 */
public class _GtkNotebookClass {

    _GtkNotebookClass() {
        // Should not be called directly
    }

    private static final GroupLayout $LAYOUT = MemoryLayout.structLayout(
        _GtkContainerClass.layout().withName("parent_class"),
        app_indicator_h.C_POINTER.withName("switch_page"),
        app_indicator_h.C_POINTER.withName("select_page"),
        app_indicator_h.C_POINTER.withName("focus_tab"),
        app_indicator_h.C_POINTER.withName("change_current_page"),
        app_indicator_h.C_POINTER.withName("move_focus_out"),
        app_indicator_h.C_POINTER.withName("reorder_tab"),
        app_indicator_h.C_POINTER.withName("insert_page"),
        app_indicator_h.C_POINTER.withName("create_window"),
        app_indicator_h.C_POINTER.withName("page_reordered"),
        app_indicator_h.C_POINTER.withName("page_removed"),
        app_indicator_h.C_POINTER.withName("page_added"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved1"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved2"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved3"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved4"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved5"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved6"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved7"),
        app_indicator_h.C_POINTER.withName("_gtk_reserved8")
    ).withName("_GtkNotebookClass");

    /**
     * The layout of this struct
     */
    public static final GroupLayout layout() {
        return $LAYOUT;
    }

    private static final GroupLayout parent_class$LAYOUT = (GroupLayout)$LAYOUT.select(groupElement("parent_class"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * GtkContainerClass parent_class
     * }
     */
    public static final GroupLayout parent_class$layout() {
        return parent_class$LAYOUT;
    }

    private static final long parent_class$OFFSET = 0;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * GtkContainerClass parent_class
     * }
     */
    public static final long parent_class$offset() {
        return parent_class$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * GtkContainerClass parent_class
     * }
     */
    public static MemorySegment parent_class(MemorySegment struct) {
        return struct.asSlice(parent_class$OFFSET, parent_class$LAYOUT.byteSize());
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * GtkContainerClass parent_class
     * }
     */
    public static void parent_class(MemorySegment struct, MemorySegment fieldValue) {
        MemorySegment.copy(fieldValue, 0L, struct, parent_class$OFFSET, parent_class$LAYOUT.byteSize());
    }

    /**
     * {@snippet lang=c :
     * void (*switch_page)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public class switch_page {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply(MemorySegment _x0, MemorySegment _x1, int _x2);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid(
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(switch_page.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(switch_page.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr,MemorySegment _x0, MemorySegment _x1, int _x2) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout switch_page$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("switch_page"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*switch_page)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final AddressLayout switch_page$layout() {
        return switch_page$LAYOUT;
    }

    private static final long switch_page$OFFSET = 976;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*switch_page)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final long switch_page$offset() {
        return switch_page$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*switch_page)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static MemorySegment switch_page(MemorySegment struct) {
        return struct.get(switch_page$LAYOUT, switch_page$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*switch_page)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static void switch_page(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(switch_page$LAYOUT, switch_page$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * gboolean (*select_page)(GtkNotebook *, gboolean)
     * }
     */
    public class select_page {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            int apply(MemorySegment _x0, int _x1);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            app_indicator_h.C_INT,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(select_page.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(select_page.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static int invoke(MemorySegment funcPtr,MemorySegment _x0, int _x1) {
            try {
                return (int) DOWN$MH.invokeExact(funcPtr, _x0, _x1);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout select_page$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("select_page"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * gboolean (*select_page)(GtkNotebook *, gboolean)
     * }
     */
    public static final AddressLayout select_page$layout() {
        return select_page$LAYOUT;
    }

    private static final long select_page$OFFSET = 984;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * gboolean (*select_page)(GtkNotebook *, gboolean)
     * }
     */
    public static final long select_page$offset() {
        return select_page$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * gboolean (*select_page)(GtkNotebook *, gboolean)
     * }
     */
    public static MemorySegment select_page(MemorySegment struct) {
        return struct.get(select_page$LAYOUT, select_page$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * gboolean (*select_page)(GtkNotebook *, gboolean)
     * }
     */
    public static void select_page(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(select_page$LAYOUT, select_page$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * gboolean (*focus_tab)(GtkNotebook *, GtkNotebookTab)
     * }
     */
    public class focus_tab {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            int apply(MemorySegment _x0, int _x1);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            app_indicator_h.C_INT,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(focus_tab.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(focus_tab.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static int invoke(MemorySegment funcPtr,MemorySegment _x0, int _x1) {
            try {
                return (int) DOWN$MH.invokeExact(funcPtr, _x0, _x1);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout focus_tab$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("focus_tab"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * gboolean (*focus_tab)(GtkNotebook *, GtkNotebookTab)
     * }
     */
    public static final AddressLayout focus_tab$layout() {
        return focus_tab$LAYOUT;
    }

    private static final long focus_tab$OFFSET = 992;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * gboolean (*focus_tab)(GtkNotebook *, GtkNotebookTab)
     * }
     */
    public static final long focus_tab$offset() {
        return focus_tab$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * gboolean (*focus_tab)(GtkNotebook *, GtkNotebookTab)
     * }
     */
    public static MemorySegment focus_tab(MemorySegment struct) {
        return struct.get(focus_tab$LAYOUT, focus_tab$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * gboolean (*focus_tab)(GtkNotebook *, GtkNotebookTab)
     * }
     */
    public static void focus_tab(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(focus_tab$LAYOUT, focus_tab$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * gboolean (*change_current_page)(GtkNotebook *, gint)
     * }
     */
    public class change_current_page {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            int apply(MemorySegment _x0, int _x1);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            app_indicator_h.C_INT,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(change_current_page.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(change_current_page.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static int invoke(MemorySegment funcPtr,MemorySegment _x0, int _x1) {
            try {
                return (int) DOWN$MH.invokeExact(funcPtr, _x0, _x1);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout change_current_page$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("change_current_page"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * gboolean (*change_current_page)(GtkNotebook *, gint)
     * }
     */
    public static final AddressLayout change_current_page$layout() {
        return change_current_page$LAYOUT;
    }

    private static final long change_current_page$OFFSET = 1000;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * gboolean (*change_current_page)(GtkNotebook *, gint)
     * }
     */
    public static final long change_current_page$offset() {
        return change_current_page$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * gboolean (*change_current_page)(GtkNotebook *, gint)
     * }
     */
    public static MemorySegment change_current_page(MemorySegment struct) {
        return struct.get(change_current_page$LAYOUT, change_current_page$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * gboolean (*change_current_page)(GtkNotebook *, gint)
     * }
     */
    public static void change_current_page(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(change_current_page$LAYOUT, change_current_page$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*move_focus_out)(GtkNotebook *, GtkDirectionType)
     * }
     */
    public class move_focus_out {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply(MemorySegment _x0, int _x1);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid(
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(move_focus_out.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(move_focus_out.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr,MemorySegment _x0, int _x1) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout move_focus_out$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("move_focus_out"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*move_focus_out)(GtkNotebook *, GtkDirectionType)
     * }
     */
    public static final AddressLayout move_focus_out$layout() {
        return move_focus_out$LAYOUT;
    }

    private static final long move_focus_out$OFFSET = 1008;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*move_focus_out)(GtkNotebook *, GtkDirectionType)
     * }
     */
    public static final long move_focus_out$offset() {
        return move_focus_out$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*move_focus_out)(GtkNotebook *, GtkDirectionType)
     * }
     */
    public static MemorySegment move_focus_out(MemorySegment struct) {
        return struct.get(move_focus_out$LAYOUT, move_focus_out$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*move_focus_out)(GtkNotebook *, GtkDirectionType)
     * }
     */
    public static void move_focus_out(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(move_focus_out$LAYOUT, move_focus_out$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * gboolean (*reorder_tab)(GtkNotebook *, GtkDirectionType, gboolean)
     * }
     */
    public class reorder_tab {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            int apply(MemorySegment _x0, int _x1, int _x2);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            app_indicator_h.C_INT,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(reorder_tab.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(reorder_tab.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static int invoke(MemorySegment funcPtr,MemorySegment _x0, int _x1, int _x2) {
            try {
                return (int) DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout reorder_tab$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("reorder_tab"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * gboolean (*reorder_tab)(GtkNotebook *, GtkDirectionType, gboolean)
     * }
     */
    public static final AddressLayout reorder_tab$layout() {
        return reorder_tab$LAYOUT;
    }

    private static final long reorder_tab$OFFSET = 1016;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * gboolean (*reorder_tab)(GtkNotebook *, GtkDirectionType, gboolean)
     * }
     */
    public static final long reorder_tab$offset() {
        return reorder_tab$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * gboolean (*reorder_tab)(GtkNotebook *, GtkDirectionType, gboolean)
     * }
     */
    public static MemorySegment reorder_tab(MemorySegment struct) {
        return struct.get(reorder_tab$LAYOUT, reorder_tab$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * gboolean (*reorder_tab)(GtkNotebook *, GtkDirectionType, gboolean)
     * }
     */
    public static void reorder_tab(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(reorder_tab$LAYOUT, reorder_tab$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * gint (*insert_page)(GtkNotebook *, GtkWidget *, GtkWidget *, GtkWidget *, gint)
     * }
     */
    public class insert_page {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            int apply(MemorySegment _x0, MemorySegment _x1, MemorySegment _x2, MemorySegment _x3, int _x4);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            app_indicator_h.C_INT,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(insert_page.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(insert_page.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static int invoke(MemorySegment funcPtr,MemorySegment _x0, MemorySegment _x1, MemorySegment _x2, MemorySegment _x3, int _x4) {
            try {
                return (int) DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2, _x3, _x4);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout insert_page$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("insert_page"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * gint (*insert_page)(GtkNotebook *, GtkWidget *, GtkWidget *, GtkWidget *, gint)
     * }
     */
    public static final AddressLayout insert_page$layout() {
        return insert_page$LAYOUT;
    }

    private static final long insert_page$OFFSET = 1024;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * gint (*insert_page)(GtkNotebook *, GtkWidget *, GtkWidget *, GtkWidget *, gint)
     * }
     */
    public static final long insert_page$offset() {
        return insert_page$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * gint (*insert_page)(GtkNotebook *, GtkWidget *, GtkWidget *, GtkWidget *, gint)
     * }
     */
    public static MemorySegment insert_page(MemorySegment struct) {
        return struct.get(insert_page$LAYOUT, insert_page$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * gint (*insert_page)(GtkNotebook *, GtkWidget *, GtkWidget *, GtkWidget *, gint)
     * }
     */
    public static void insert_page(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(insert_page$LAYOUT, insert_page$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * GtkNotebook *(*create_window)(GtkNotebook *, GtkWidget *, gint, gint)
     * }
     */
    public class create_window {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            MemorySegment apply(MemorySegment _x0, MemorySegment _x1, int _x2, int _x3);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(create_window.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(create_window.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static MemorySegment invoke(MemorySegment funcPtr,MemorySegment _x0, MemorySegment _x1, int _x2, int _x3) {
            try {
                return (MemorySegment) DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2, _x3);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout create_window$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("create_window"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * GtkNotebook *(*create_window)(GtkNotebook *, GtkWidget *, gint, gint)
     * }
     */
    public static final AddressLayout create_window$layout() {
        return create_window$LAYOUT;
    }

    private static final long create_window$OFFSET = 1032;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * GtkNotebook *(*create_window)(GtkNotebook *, GtkWidget *, gint, gint)
     * }
     */
    public static final long create_window$offset() {
        return create_window$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * GtkNotebook *(*create_window)(GtkNotebook *, GtkWidget *, gint, gint)
     * }
     */
    public static MemorySegment create_window(MemorySegment struct) {
        return struct.get(create_window$LAYOUT, create_window$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * GtkNotebook *(*create_window)(GtkNotebook *, GtkWidget *, gint, gint)
     * }
     */
    public static void create_window(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(create_window$LAYOUT, create_window$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*page_reordered)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public class page_reordered {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply(MemorySegment _x0, MemorySegment _x1, int _x2);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid(
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(page_reordered.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(page_reordered.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr,MemorySegment _x0, MemorySegment _x1, int _x2) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout page_reordered$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("page_reordered"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*page_reordered)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final AddressLayout page_reordered$layout() {
        return page_reordered$LAYOUT;
    }

    private static final long page_reordered$OFFSET = 1040;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*page_reordered)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final long page_reordered$offset() {
        return page_reordered$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*page_reordered)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static MemorySegment page_reordered(MemorySegment struct) {
        return struct.get(page_reordered$LAYOUT, page_reordered$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*page_reordered)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static void page_reordered(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(page_reordered$LAYOUT, page_reordered$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*page_removed)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public class page_removed {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply(MemorySegment _x0, MemorySegment _x1, int _x2);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid(
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(page_removed.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(page_removed.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr,MemorySegment _x0, MemorySegment _x1, int _x2) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout page_removed$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("page_removed"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*page_removed)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final AddressLayout page_removed$layout() {
        return page_removed$LAYOUT;
    }

    private static final long page_removed$OFFSET = 1048;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*page_removed)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final long page_removed$offset() {
        return page_removed$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*page_removed)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static MemorySegment page_removed(MemorySegment struct) {
        return struct.get(page_removed$LAYOUT, page_removed$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*page_removed)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static void page_removed(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(page_removed$LAYOUT, page_removed$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*page_added)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public class page_added {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply(MemorySegment _x0, MemorySegment _x1, int _x2);
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid(
            app_indicator_h.C_POINTER,
            app_indicator_h.C_POINTER,
            app_indicator_h.C_INT
        );

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(page_added.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(page_added.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr,MemorySegment _x0, MemorySegment _x1, int _x2) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout page_added$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("page_added"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*page_added)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final AddressLayout page_added$layout() {
        return page_added$LAYOUT;
    }

    private static final long page_added$OFFSET = 1056;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*page_added)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static final long page_added$offset() {
        return page_added$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*page_added)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static MemorySegment page_added(MemorySegment struct) {
        return struct.get(page_added$LAYOUT, page_added$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*page_added)(GtkNotebook *, GtkWidget *, guint)
     * }
     */
    public static void page_added(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(page_added$LAYOUT, page_added$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved1)(void)
     * }
     */
    public class _gtk_reserved1 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved1.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved1.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved1$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved1"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved1)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved1$layout() {
        return _gtk_reserved1$LAYOUT;
    }

    private static final long _gtk_reserved1$OFFSET = 1064;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved1)(void)
     * }
     */
    public static final long _gtk_reserved1$offset() {
        return _gtk_reserved1$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved1)(void)
     * }
     */
    public static MemorySegment _gtk_reserved1(MemorySegment struct) {
        return struct.get(_gtk_reserved1$LAYOUT, _gtk_reserved1$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved1)(void)
     * }
     */
    public static void _gtk_reserved1(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved1$LAYOUT, _gtk_reserved1$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved2)(void)
     * }
     */
    public class _gtk_reserved2 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved2.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved2.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved2$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved2"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved2)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved2$layout() {
        return _gtk_reserved2$LAYOUT;
    }

    private static final long _gtk_reserved2$OFFSET = 1072;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved2)(void)
     * }
     */
    public static final long _gtk_reserved2$offset() {
        return _gtk_reserved2$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved2)(void)
     * }
     */
    public static MemorySegment _gtk_reserved2(MemorySegment struct) {
        return struct.get(_gtk_reserved2$LAYOUT, _gtk_reserved2$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved2)(void)
     * }
     */
    public static void _gtk_reserved2(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved2$LAYOUT, _gtk_reserved2$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved3)(void)
     * }
     */
    public class _gtk_reserved3 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved3.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved3.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved3$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved3"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved3)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved3$layout() {
        return _gtk_reserved3$LAYOUT;
    }

    private static final long _gtk_reserved3$OFFSET = 1080;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved3)(void)
     * }
     */
    public static final long _gtk_reserved3$offset() {
        return _gtk_reserved3$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved3)(void)
     * }
     */
    public static MemorySegment _gtk_reserved3(MemorySegment struct) {
        return struct.get(_gtk_reserved3$LAYOUT, _gtk_reserved3$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved3)(void)
     * }
     */
    public static void _gtk_reserved3(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved3$LAYOUT, _gtk_reserved3$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved4)(void)
     * }
     */
    public class _gtk_reserved4 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved4.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved4.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved4$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved4"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved4)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved4$layout() {
        return _gtk_reserved4$LAYOUT;
    }

    private static final long _gtk_reserved4$OFFSET = 1088;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved4)(void)
     * }
     */
    public static final long _gtk_reserved4$offset() {
        return _gtk_reserved4$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved4)(void)
     * }
     */
    public static MemorySegment _gtk_reserved4(MemorySegment struct) {
        return struct.get(_gtk_reserved4$LAYOUT, _gtk_reserved4$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved4)(void)
     * }
     */
    public static void _gtk_reserved4(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved4$LAYOUT, _gtk_reserved4$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved5)(void)
     * }
     */
    public class _gtk_reserved5 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved5.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved5.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved5$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved5"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved5)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved5$layout() {
        return _gtk_reserved5$LAYOUT;
    }

    private static final long _gtk_reserved5$OFFSET = 1096;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved5)(void)
     * }
     */
    public static final long _gtk_reserved5$offset() {
        return _gtk_reserved5$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved5)(void)
     * }
     */
    public static MemorySegment _gtk_reserved5(MemorySegment struct) {
        return struct.get(_gtk_reserved5$LAYOUT, _gtk_reserved5$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved5)(void)
     * }
     */
    public static void _gtk_reserved5(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved5$LAYOUT, _gtk_reserved5$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved6)(void)
     * }
     */
    public class _gtk_reserved6 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved6.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved6.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved6$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved6"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved6)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved6$layout() {
        return _gtk_reserved6$LAYOUT;
    }

    private static final long _gtk_reserved6$OFFSET = 1104;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved6)(void)
     * }
     */
    public static final long _gtk_reserved6$offset() {
        return _gtk_reserved6$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved6)(void)
     * }
     */
    public static MemorySegment _gtk_reserved6(MemorySegment struct) {
        return struct.get(_gtk_reserved6$LAYOUT, _gtk_reserved6$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved6)(void)
     * }
     */
    public static void _gtk_reserved6(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved6$LAYOUT, _gtk_reserved6$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved7)(void)
     * }
     */
    public class _gtk_reserved7 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved7.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved7.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved7$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved7"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved7)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved7$layout() {
        return _gtk_reserved7$LAYOUT;
    }

    private static final long _gtk_reserved7$OFFSET = 1112;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved7)(void)
     * }
     */
    public static final long _gtk_reserved7$offset() {
        return _gtk_reserved7$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved7)(void)
     * }
     */
    public static MemorySegment _gtk_reserved7(MemorySegment struct) {
        return struct.get(_gtk_reserved7$LAYOUT, _gtk_reserved7$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved7)(void)
     * }
     */
    public static void _gtk_reserved7(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved7$LAYOUT, _gtk_reserved7$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gtk_reserved8)(void)
     * }
     */
    public class _gtk_reserved8 {

        /**
         * The function pointer signature, expressed as a functional interface
         */
        public interface Function {
            void apply();
        }

        private static final FunctionDescriptor $DESC = FunctionDescriptor.ofVoid();

        /**
         * The descriptor of this function pointer
         */
        public static FunctionDescriptor descriptor() {
            return $DESC;
        }

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(_gtk_reserved8.Function.class, "apply", $DESC);

        /**
         * Allocates a new upcall stub, whose implementation is defined by {@code fi}.
         * The lifetime of the returned segment is managed by {@code arena}
         */
        public static MemorySegment allocate(_gtk_reserved8.Function fi, Arena arena) {
            return Linker.nativeLinker().upcallStub(UP$MH.bindTo(fi), $DESC, arena);
        }

        private static final MethodHandle DOWN$MH = Linker.nativeLinker().downcallHandle($DESC);

        /**
         * Invoke the upcall stub {@code funcPtr}, with given parameters
         */
        public static void invoke(MemorySegment funcPtr) {
            try {
                 DOWN$MH.invokeExact(funcPtr);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

    private static final AddressLayout _gtk_reserved8$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gtk_reserved8"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved8)(void)
     * }
     */
    public static final AddressLayout _gtk_reserved8$layout() {
        return _gtk_reserved8$LAYOUT;
    }

    private static final long _gtk_reserved8$OFFSET = 1120;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved8)(void)
     * }
     */
    public static final long _gtk_reserved8$offset() {
        return _gtk_reserved8$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved8)(void)
     * }
     */
    public static MemorySegment _gtk_reserved8(MemorySegment struct) {
        return struct.get(_gtk_reserved8$LAYOUT, _gtk_reserved8$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gtk_reserved8)(void)
     * }
     */
    public static void _gtk_reserved8(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gtk_reserved8$LAYOUT, _gtk_reserved8$OFFSET, fieldValue);
    }

    /**
     * Obtains a slice of {@code arrayParam} which selects the array element at {@code index}.
     * The returned segment has address {@code arrayParam.address() + index * layout().byteSize()}
     */
    public static MemorySegment asSlice(MemorySegment array, long index) {
        return array.asSlice(layout().byteSize() * index);
    }

    /**
     * The size (in bytes) of this struct
     */
    public static long sizeof() { return layout().byteSize(); }

    /**
     * Allocate a segment of size {@code layout().byteSize()} using {@code allocator}
     */
    public static MemorySegment allocate(SegmentAllocator allocator) {
        return allocator.allocate(layout());
    }

    /**
     * Allocate an array of size {@code elementCount} using {@code allocator}.
     * The returned segment has size {@code elementCount * layout().byteSize()}.
     */
    public static MemorySegment allocateArray(long elementCount, SegmentAllocator allocator) {
        return allocator.allocate(MemoryLayout.sequenceLayout(elementCount, layout()));
    }

    /**
     * Reinterprets {@code addr} using target {@code arena} and {@code cleanupAction) (if any).
     * The returned segment has size {@code layout().byteSize()}
     */
    public static MemorySegment reinterpret(MemorySegment addr, Arena arena, Consumer cleanup) {
        return reinterpret(addr, 1, arena, cleanup);
    }

    /**
     * Reinterprets {@code addr} using target {@code arena} and {@code cleanupAction) (if any).
     * The returned segment has size {@code elementCount * layout().byteSize()}
     */
    public static MemorySegment reinterpret(MemorySegment addr, long elementCount, Arena arena, Consumer cleanup) {
        return addr.reinterpret(layout().byteSize() * elementCount, arena, cleanup);
    }
}





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