def METHOD_NAME(self, index):
    row = []
    for i in range(self.columns):
        tfield = TextField(
            position=[0, 0],
            width=self.cell_width,
            height=self.cell_height,
            multiline=False,
        )
        self.add(tfield)
        row.append(tfield)
    self.cells.insert(index, row)
    self.bounds[1] = self.bounds[1] + self.cell_padding + self.cell_height