def getDimension(self):
        return (self.sheet.rowCount(), self.sheet.columnCount())
:param event:
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/packages/spreadsheet/spreadsheet_tab.py/StandardWidgetSheetTab.getDimension--crossover with--dataset/ETHPy150Open ODM2/ODMToolsPython/odmtools/controller/frmAddPoints.py/AddPoints.onDeleteBtn