code: def validator_aok_values():
      return StringValidator(
          "prop",
          "parent",
          values=["foo", "BAR", "", "baz"],
          array_ok=True,
      )
  
imports: import pytest
  from _plotly_utils.basevalidators import StringValidator
  import numpy
label_desc: Use image node_id 7 for calling a global function with example usage: validator_aok_values() and returns: StringValidator