Bug 65762 [Viewers] Need to back out of change to AbstractTreeViewer.isExpandable
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/viewsupport/ProblemTreeViewer.java
/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.viewsupport;
import java.util.ArrayList;
import org.eclipse.core.resources.IResource;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.Widget;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jdt.ui.IWorkingCopyProvider;
import org.eclipse.jdt.ui.ProblemsLabelDecorator.ProblemsLabelChangedEvent;
/**
 * Extends a  TreeViewer to allow more performance when showing error ticks.
 * A <code>ProblemItemMapper</code> is contained that maps all items in
 * the tree to underlying resource
 */
public class ProblemTreeViewer extends TreeViewer {