columnListener = null;
public void dispose () {		if (this.column > -1 && this.column < table.getColumnCount()){		TableColumn tableColumn = table.getColumn(this.column);		tableColumn.removeListener(SWT.Resize, columnListener);		tableColumn.removeListener(SWT.Move, columnListener);	}	table = null;	item = null;	column = -1;		super.dispose();}