def save(self, filename=None):
        filename = Path(filename) if filename is not None else self.filename
        with filename.open("w") as f:
            f.write(self.yaml)
def testWrapperV2Build(self, wrapper):
    cell = rnn_cell_impl.LSTMCell(10)
    wrapper = wrapper(cell)
    wrapper.build((1,))
    self.assertTrue(cell.built)