Bug 111631 [Viewers] TreeViewer needs more TableViewer API
As the TreeViewer is meant to replace the TableTreeViewer we need to add some of the API that the TableViewer had to it so that it can be used like a table. public void insert(Object element, int position) public void add(Object[] objects) Both need to be added.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
/**
     * Constant indicating that all levels of the tree should be expanded or
     * collapsed.
     * 
     * @see #expandToLevel
     * @see #collapseToLevel
     */
    public static final int ALL_LEVELS = -1;
    /**
     * List of registered tree listeners (element type: <code>TreeListener</code>). */
    private ListenerList treeListeners = new ListenerList();
    /**
     * The level to which the tree is automatically expanded each time the
     * viewer's input is changed (that is, by <code>setInput</code>). A
     * value of 0 means that auto-expand is off.
     * 
     * @see #setAutoExpandLevel
     */
    private int expandToLevel = 0;
    /**
     * Safe runnable used to update an item.
     */
    class UpdateItemSafeRunnable extends SafeRunnable {