treeCommon.createDefaultExpressionTree( dataSetList );
treeCommon.createFilteredExpressionTree( dataSetList, filterList );
	private void createLeftTree( Composite parent )	{		Tree tree = new Tree( parent, SWT.BORDER );		tree.setLayoutData( new GridData( GridData.FILL_BOTH ) );		treeCommon.setTree( tree );		treeCommon.createDefaultExpressionTree( dataSetList );		// Add tool tips		tree.setToolTipText( "" ); //$NON-NLS-1$		treeCommon.addMouseTrackListener( );		treeCommon.addMouseListener( );		treeCommon.addDragSupportToTree( );	}