code: def maybe_define_flags():
      """Defines any required flags that are missing."""
      for f in REQUIRED_FLAGS:
          try:
              flags.DEFINE_string(f, None, "flag defined by test lib")
          except flags.DuplicateFlagError:
              pass
  
file_path: tensorflow-upstream/tensorflow/python/tpu/tpu_test_wrapper.py
imports: import ast
  import importlib
  import os
  import sys
  import uuid
  from tensorflow.python.platform import flags
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 1 for calling a global function with example usage: maybe_define_flags() without return types