/**
* Page constructor.
*/
public EditableTreeTablePage()
{
IColumn columns[] = new IColumn[] {
new PropertyTreeColumn<String>(new ColumnLocation(Alignment.LEFT, 18, Unit.EM),
"Tree Column", "userObject.property1"),
new PropertyEditableColumn<String>(new ColumnLocation(Alignment.LEFT, 12, Unit.EM),
"L2", "userObject.property2"),
new PropertyEditableColumn<String>(new ColumnLocation(Alignment.MIDDLE, 2,