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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 _GdkWindowClass {
 *     GObjectClass parent_class;
 *     GdkWindow *(*pick_embedded_child)(GdkWindow *, gdouble, gdouble);
 *     void (*to_embedder)(GdkWindow *, gdouble, gdouble, gdouble *, gdouble *);
 *     void (*from_embedder)(GdkWindow *, gdouble, gdouble, gdouble *, gdouble *);
 *     cairo_surface_t *(*create_surface)(GdkWindow *, gint, gint);
 *     void (*_gdk_reserved1)(void);
 *     void (*_gdk_reserved2)(void);
 *     void (*_gdk_reserved3)(void);
 *     void (*_gdk_reserved4)(void);
 *     void (*_gdk_reserved5)(void);
 *     void (*_gdk_reserved6)(void);
 *     void (*_gdk_reserved7)(void);
 *     void (*_gdk_reserved8)(void);
 * }
 * }
 */
public class _GdkWindowClass {

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

    private static final GroupLayout $LAYOUT = MemoryLayout.structLayout(
        _GObjectClass.layout().withName("parent_class"),
        app_indicator_h.C_POINTER.withName("pick_embedded_child"),
        app_indicator_h.C_POINTER.withName("to_embedder"),
        app_indicator_h.C_POINTER.withName("from_embedder"),
        app_indicator_h.C_POINTER.withName("create_surface"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved1"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved2"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved3"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved4"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved5"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved6"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved7"),
        app_indicator_h.C_POINTER.withName("_gdk_reserved8")
    ).withName("_GdkWindowClass");

    /**
     * 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 :
     * GObjectClass 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 :
     * GObjectClass parent_class
     * }
     */
    public static final long parent_class$offset() {
        return parent_class$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * GObjectClass 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 :
     * GObjectClass 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 :
     * GdkWindow *(*pick_embedded_child)(GdkWindow *, gdouble, gdouble)
     * }
     */
    public class pick_embedded_child {

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

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

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

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(pick_embedded_child.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(pick_embedded_child.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, double _x1, double _x2) {
            try {
                return (MemorySegment) DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

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

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

    private static final long pick_embedded_child$OFFSET = 136;

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

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

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

    /**
     * {@snippet lang=c :
     * void (*to_embedder)(GdkWindow *, gdouble, gdouble, gdouble *, gdouble *)
     * }
     */
    public class to_embedder {

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

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

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

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(to_embedder.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(to_embedder.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, double _x1, double _x2, MemorySegment _x3, MemorySegment _x4) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2, _x3, _x4);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

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

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

    private static final long to_embedder$OFFSET = 144;

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

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

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

    /**
     * {@snippet lang=c :
     * void (*from_embedder)(GdkWindow *, gdouble, gdouble, gdouble *, gdouble *)
     * }
     */
    public class from_embedder {

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

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

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

        private static final MethodHandle UP$MH = app_indicator_h.upcallHandle(from_embedder.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(from_embedder.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, double _x1, double _x2, MemorySegment _x3, MemorySegment _x4) {
            try {
                 DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2, _x3, _x4);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

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

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

    private static final long from_embedder$OFFSET = 152;

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

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

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

    /**
     * {@snippet lang=c :
     * cairo_surface_t *(*create_surface)(GdkWindow *, gint, gint)
     * }
     */
    public class create_surface {

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

        private static final FunctionDescriptor $DESC = FunctionDescriptor.of(
            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_surface.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_surface.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, int _x1, int _x2) {
            try {
                return (MemorySegment) DOWN$MH.invokeExact(funcPtr, _x0, _x1, _x2);
            } catch (Throwable ex$) {
                throw new AssertionError("should not reach here", ex$);
            }
        }
    }

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

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

    private static final long create_surface$OFFSET = 160;

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

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

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

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved1)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved1$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved1"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved1)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved1$layout() {
        return _gdk_reserved1$LAYOUT;
    }

    private static final long _gdk_reserved1$OFFSET = 168;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved1)(void)
     * }
     */
    public static final long _gdk_reserved1$offset() {
        return _gdk_reserved1$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved1)(void)
     * }
     */
    public static MemorySegment _gdk_reserved1(MemorySegment struct) {
        return struct.get(_gdk_reserved1$LAYOUT, _gdk_reserved1$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved1)(void)
     * }
     */
    public static void _gdk_reserved1(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved1$LAYOUT, _gdk_reserved1$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved2)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved2$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved2"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved2)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved2$layout() {
        return _gdk_reserved2$LAYOUT;
    }

    private static final long _gdk_reserved2$OFFSET = 176;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved2)(void)
     * }
     */
    public static final long _gdk_reserved2$offset() {
        return _gdk_reserved2$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved2)(void)
     * }
     */
    public static MemorySegment _gdk_reserved2(MemorySegment struct) {
        return struct.get(_gdk_reserved2$LAYOUT, _gdk_reserved2$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved2)(void)
     * }
     */
    public static void _gdk_reserved2(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved2$LAYOUT, _gdk_reserved2$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved3)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved3$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved3"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved3)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved3$layout() {
        return _gdk_reserved3$LAYOUT;
    }

    private static final long _gdk_reserved3$OFFSET = 184;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved3)(void)
     * }
     */
    public static final long _gdk_reserved3$offset() {
        return _gdk_reserved3$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved3)(void)
     * }
     */
    public static MemorySegment _gdk_reserved3(MemorySegment struct) {
        return struct.get(_gdk_reserved3$LAYOUT, _gdk_reserved3$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved3)(void)
     * }
     */
    public static void _gdk_reserved3(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved3$LAYOUT, _gdk_reserved3$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved4)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved4$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved4"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved4)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved4$layout() {
        return _gdk_reserved4$LAYOUT;
    }

    private static final long _gdk_reserved4$OFFSET = 192;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved4)(void)
     * }
     */
    public static final long _gdk_reserved4$offset() {
        return _gdk_reserved4$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved4)(void)
     * }
     */
    public static MemorySegment _gdk_reserved4(MemorySegment struct) {
        return struct.get(_gdk_reserved4$LAYOUT, _gdk_reserved4$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved4)(void)
     * }
     */
    public static void _gdk_reserved4(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved4$LAYOUT, _gdk_reserved4$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved5)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved5$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved5"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved5)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved5$layout() {
        return _gdk_reserved5$LAYOUT;
    }

    private static final long _gdk_reserved5$OFFSET = 200;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved5)(void)
     * }
     */
    public static final long _gdk_reserved5$offset() {
        return _gdk_reserved5$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved5)(void)
     * }
     */
    public static MemorySegment _gdk_reserved5(MemorySegment struct) {
        return struct.get(_gdk_reserved5$LAYOUT, _gdk_reserved5$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved5)(void)
     * }
     */
    public static void _gdk_reserved5(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved5$LAYOUT, _gdk_reserved5$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved6)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved6$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved6"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved6)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved6$layout() {
        return _gdk_reserved6$LAYOUT;
    }

    private static final long _gdk_reserved6$OFFSET = 208;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved6)(void)
     * }
     */
    public static final long _gdk_reserved6$offset() {
        return _gdk_reserved6$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved6)(void)
     * }
     */
    public static MemorySegment _gdk_reserved6(MemorySegment struct) {
        return struct.get(_gdk_reserved6$LAYOUT, _gdk_reserved6$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved6)(void)
     * }
     */
    public static void _gdk_reserved6(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved6$LAYOUT, _gdk_reserved6$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved7)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved7$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved7"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved7)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved7$layout() {
        return _gdk_reserved7$LAYOUT;
    }

    private static final long _gdk_reserved7$OFFSET = 216;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved7)(void)
     * }
     */
    public static final long _gdk_reserved7$offset() {
        return _gdk_reserved7$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved7)(void)
     * }
     */
    public static MemorySegment _gdk_reserved7(MemorySegment struct) {
        return struct.get(_gdk_reserved7$LAYOUT, _gdk_reserved7$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved7)(void)
     * }
     */
    public static void _gdk_reserved7(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved7$LAYOUT, _gdk_reserved7$OFFSET, fieldValue);
    }

    /**
     * {@snippet lang=c :
     * void (*_gdk_reserved8)(void)
     * }
     */
    public class _gdk_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(_gdk_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(_gdk_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 _gdk_reserved8$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("_gdk_reserved8"));

    /**
     * Layout for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved8)(void)
     * }
     */
    public static final AddressLayout _gdk_reserved8$layout() {
        return _gdk_reserved8$LAYOUT;
    }

    private static final long _gdk_reserved8$OFFSET = 224;

    /**
     * Offset for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved8)(void)
     * }
     */
    public static final long _gdk_reserved8$offset() {
        return _gdk_reserved8$OFFSET;
    }

    /**
     * Getter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved8)(void)
     * }
     */
    public static MemorySegment _gdk_reserved8(MemorySegment struct) {
        return struct.get(_gdk_reserved8$LAYOUT, _gdk_reserved8$OFFSET);
    }

    /**
     * Setter for field:
     * {@snippet lang=c :
     * void (*_gdk_reserved8)(void)
     * }
     */
    public static void _gdk_reserved8(MemorySegment struct, MemorySegment fieldValue) {
        struct.set(_gdk_reserved8$LAYOUT, _gdk_reserved8$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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