code: def _string_generator(descriptor, max_length=0, limit=0):
      'Helper to create a string generator'
      vals = list(values.get_strings(max_length, limit))
      return gen.IterValueGenerator(descriptor.name, valsf _string_generator(descriptor, max_length=0, limit=0):
      'Helper to create a string generator'
      vals = list(values.get_strings(max_length, limit))
      return gen.IterValueGenerator(descriptor.name, vals)
docs: Helper to create a string generator