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
}
    /**
     * If the argument is a tree path, returns its last segment, otherwise
     * return the argument
     * @param elementOrPath an element or a tree path
     * @return the element, or the last segment of the tree path
     */
	private Object internalToElement(Object elementOrPath) {
		if (elementOrPath instanceof TreePath) {
			return ((TreePath)elementOrPath).getLastSegment();
		}
		return elementOrPath;
	}
    /**
	 * This method takes a tree path or an element. If the argument is not a
	 * tree path, returns the parent of the given element or <code>null</code>
	 * if the parent is not known. If the argument is a tree path with more than
	 * one segment, returns its parent tree path, otherwise returns
	 * <code>null</code>.
	 * 
	 * @param elementOrTreePath
	 * @return the parent element, or parent path, or <code>null</code>
	 * 
	 * @since 3.2
	 */ 
    protected Object getParentElement(Object elementOrTreePath) {
    	if(elementOrTreePath instanceof TreePath) {
    		TreePath treePath = (TreePath)elementOrTreePath;
    		if(treePath.getSegmentCount() <= 1) {
    			return null;