Turn a Tensor into a tf.Tensor.

    Args:
      x: a Tensor
      laid_out_x: a LaidOutTensor
    Returns:
      a tf.Tensor

def export_to_tf_tensor(self, x, laid_out_x):
    """Turn a Tensor into a tf.Tensor.

    Args:
      x: a Tensor
      laid_out_x: a LaidOutTensor
    Returns:
      a tf.Tensor
    """
    return self.combine_slices(laid_out_x.all_slices, x.shape)