def requires_attr_values(self, attr_type):
        """Determines whether the list of possible values are required for
        attributes of the given type.

        Args:
            attr_type: the attribute type string

        Returns:
            True/False
        """
        raise NotImplementedError(
            "subclass must implement requires_attr_values()"
        )
Determines whether the list of possible values are required for
        attributes of the given type.

        Args:
            attr_type: the attribute type string

        Returns:
            True/False
        
fiftyone/utils/annotations.py