code: def test_normalize_nfc(self):
      txt = [
          "\u1e9b\u0323",
      ]
      expected = [
          "\u1e9b\u0323".encode("utf-8"),
      ]
      actual, _ = normalize_ops.normalize_utf8_with_offsets_map(
          txt, "NFC"
      )
      self.assertAllEqual(expected, actual)
      actual, _ = normalize_ops.normalize_utf8_with_offsets_map(
          txt, "nfc"
      )
      self.assertAllEqual(expected, actual)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops import normalize_ops
label_desc: Use image node_id 2 for calling the NormalizeWithOffsetsMapOpsTest obj's underlying member method code with example usage: obj.test_normalize_nfc() without return types