code: def _convert_ragged(self, value, ragged_rank):
      if value is None:
          return None
      if ragged_rank is None or ragged_rank > 0:
          return ragged_factory_ops.constant(
              value, ragged_rank=ragged_rank
          )
      else:
          return constant_op.constant(value)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops import pad_along_dimension_op
label_desc: Use image node_id 17 for calling the PadAlongDimensionOpTest obj's underlying member method code with example usage: obj._convert_ragged(value, ragged_rank) and returns: None, ragged_factory_ops, constant_op