test.testRemoveRow();
test.testRemoveAllRows();
test.testUpdateCellData();
test.testUpdateRowData();
test.testUpdateRowHeading();
test.cleanup();
// a somehwat less straight-forward test: the data model is expected to implicitly increase its column count
// when you add a row which has more columns than currently known
final XMutableGridDataModel dataModel = DefaultGridDataModel.create( m_context );
dataModel.addRow( 0, new Object[] { 1 } );