code: def _is_arg_name(name):
      """Returns whether name is a valid arg name.
  
      This is used to prevent multiple words (plaintext) from being misinterpreted
      as an argument name. Any line that doesn't match the pattern for a valid
      argument is treated as not being an argument.
  
      Args:
        name: The name of the potential arg.
      Returns:
        True if name looks like an arg name, False otherwise.
      """
      name = name.strip()
      # arg_pattern is a letter or underscore followed by
      # zero or more letters, numbers, or underscores.
      arg_pattern = r"^[a-zA-Z_]\w*$"
      re.match(arg_pattern, name)
      return re.match(arg_pattern, name) is not None
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import enum
  import re
  import textwrap
label_desc: Use image node_id 6 for calling a global function with example usage: _is_arg_name(name) and returns: unknown