code: def validator_extra_aok():
      return FlaglistValidator(
          "prop",
          "parent",
          flags=FLAGS,
          extras=EXTRAS,
          array_ok=True,
      )
  
imports: import itertools
  import pytest
  from _plotly_utils.basevalidators import FlaglistValidator
  import numpy
label_desc: Use image node_id 3 for calling a global function with example usage: validator_extra_aok() and returns: FlaglistValidator