Bug 171649 [Viewers] AbstractTreeViewerisExpandable(elementOrTreePath) is not called when using a ITreePathContentProvider
Build ID: 3.3M3 More information: see AbstractTreeViewer.java, line 1974, the content provider hasChildren() should not be called directly
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ColumnViewer#getColumnViewerOwner(int)
	 */
	protected Widget getColumnViewerOwner(int columnIndex) {
		
		return null;
	}
		
	/**
	 * This implementation of {@link #getItemAt(Point)} returns null to ensure
	 * API backwards compatibility. Subclasses should override.
	 * 
	 * @since 3.3
	 */
	protected Item getItemAt(Point point) {
		return null;
	}
	
	/**
	 * This implementation of {@link #createViewerEditor()} returns null to ensure
	 * API backwards compatibility. Subclasses should override.
	 *
	 * @since 3.3
	 */
	protected AbstractViewerEditor createViewerEditor() {
		return null;
	}