def is_cell_empty(self, row, col):
        model, new_col = self._resolve_column_index(col)

        if model is None:
            return True

        else:
            return model.is_cell_empty(row, new_col)
Returns True if the cell at (row, col) has a None value,
dataset/ETHPy150Open enthought/pyface/pyface/ui/wx/grid/composite_grid_model.py/CompositeGridModel.is_cell_empty