code: def testForwarding(self, op):
      with self.cached_session():
          # Generate an input that is uniquely consumed by the regex op.
          # This exercises code paths which are optimized for this case
          # (e.g., using forwarding).
          inp = string_ops.substr(
              constant_op.constant(
                  ["AbCdEfG", "HiJkLmN"], dtypes.string
              ),
              pos=0,
              len=5,
          )
          stripped = op(inp, "\\p{Ll}", ".")
          self.assertAllEqual([b"A.C.E", b"H.J.L"], stripped)
  
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 gen_string_ops
  from tensorflow.python.ops import string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the RegexReplaceOpVariantsTest obj's underlying member method code with example usage: obj.testForwarding(op) without return types