code: def _none_to_empty_string(maybe_string):
      return maybe_string if maybe_string is not None else ""
  
imports: import abc
  import warnings
  from copy import copy
  from operator import itemgetter
  from os import getenv
  import furl
  import six
  from attr import attrib, attrs
label_desc: Use image node_id 1 for calling a global function with example usage: _none_to_empty_string(maybe_string) and returns: unknown