code: def test_forwarding(self):
      with self.cached_session():
          # Generate an input that is uniquely consumed by the transcode op.
          # This exercises code paths which are optimized for this case
          # (e.g., using forwarding).
          inp = string_ops.substr(
              constant_op.constant(
                  [b"AbCdEfG", b"HiJkLmN"], dtypes.string
              ),
              pos=0,
              len=5,
          )
          transcoded = string_ops.unicode_transcode(
              inp, input_encoding="UTF-8", output_encoding="UTF-8"
          )
  
          self.assertAllEqual([b"AbCdE", b"HiJkL"], transcoded)
  
imports: from absl.testing import parameterized
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 22 for calling the UnicodeTranscodeOpTest obj's underlying member method code with example usage: obj.test_forwarding() without return types