docs: def validate(self, value):
          """Make sure that the inspected value is of type `list` or `tuple` """
          if not isinstance(value, (list, tuple)) or isinstance(value, str_types):
              self.raise_error('Only lists and tuples may be used in the ListField vs provided {0}'
                               .format(type(value).__name__))
          super(ListField, self).validate(value)