Bug 141192 [Viewers] Javadoc change about multiple equal elements in StructuredViewer and AbstractTreeViewer
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
}
    /**
     * Sets which nodes are expanded in this viewer's tree. The given list
     * contains the tree paths that are to be expanded; all other nodes are to
     * be collapsed.
     * <p>
     * This method is typically used when restoring the interesting state of a
     * viewer captured by an earlier call to <code>getExpandedTreePaths</code>.
     * </p>
     * 
     * @param treePaths
     *           the array of expanded tree paths
     * @see #getExpandedTreePaths()
     * 
     * @since 3.2
     */
    public void setExpandedTreePaths(TreePath[] treePaths) {
        assertElementsNotNull(treePaths);
        final IElementComparer comparer = getComparer();
        IElementComparer treePathComparer = new IElementComparer(){
			public boolean equals(Object a, Object b) {
				return ((TreePath)a).equals(((TreePath)b), comparer);
			}
			public int hashCode(Object element) {
				return ((TreePath)element).hashCode(comparer);
			}};
        CustomHashtable expandedTreePaths = new CustomHashtable(treePaths.length * 2 + 1, treePathComparer);
        for (int i = 0; i < treePaths.length; ++i) {
            TreePath treePath = treePaths[i];