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This project contains a parser for the Checker Framework's stub files: https://checkerframework.org/manual/#stub . It is a fork of the JavaParser project.

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/*
 * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
 * Copyright (C) 2011, 2013-2024 The JavaParser Team.
 *
 * This file is part of JavaParser.
 *
 * JavaParser can be used either under the terms of
 * a) the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * b) the terms of the Apache License
 *
 * You should have received a copy of both licenses in LICENCE.LGPL and
 * LICENCE.APACHE. Please refer to those files for details.
 *
 * JavaParser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 */
package com.github.javaparser.ast.observer;

import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.NodeList;

public abstract class AstObserverAdapter implements AstObserver {

    @Override
    public void propertyChange(Node observedNode, ObservableProperty property, Object oldValue, Object newValue) {
        // do nothing
    }

    @Override
    public void parentChange(Node observedNode, Node previousParent, Node newParent) {
        // do nothing
    }

    @Override
    public void listChange(NodeList observedNode, ListChangeType type, int index, Node nodeAddedOrRemoved) {
        // do nothing
    }

    @Override
    public void listReplacement(NodeList observedNode, int index, Node oldNode, Node newNode) {
        // do nothing
    }
}