code: def _utf8(char):
      return char.encode("utf-8")
  
imports: from absl.testing import parameterized
  import tensorflow
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import string_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow_text.python.ops import regex_split_ops
label_desc: Use image node_id 1 for calling a global function with example usage: _utf8(char) and returns: char