Bug 141192 [Viewers] Javadoc change about multiple equal elements in StructuredViewer and AbstractTreeViewer
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* @param style
     *           SWT style bits
     * @param index
     *           if non-negative, indicates the position to insert the item
     *           into its parent
     * @return the newly-created item
     */
    protected abstract Item newItem(Widget parent, int style, int index);
    /**
     * Removes the given elements from this viewer. The selection is updated if
     * required.
     * <p>
     * This method should be called (by the content provider) when elements
     * have been removed from the model, in order to cause the viewer to
     * accurately reflect the model. This method only affects the viewer, not
     * the model.
     * </p>
     * 
     * @param elementsOrTreePaths
     *           the elements to remove
     */
    public void remove(final Object[] elementsOrTreePaths) {
        assertElementsNotNull(elementsOrTreePaths);
        if (elementsOrTreePaths.length == 0) {
        	return;
        }
        preservingSelection(new Runnable() {
            public void run() {
                internalRemove(elementsOrTreePaths);
            }