@property<EOL><INDENT>def feature_types(self):<DEDENT>
r = self.session.query(distinct(models.Feature.type_)).all()<EOL>return [x[<NUM_LIT:0>] for x in r]<EOL>
Distinct types (``type_``) in :class:`.models.Feature`

        :return: all distinct feature types
        :rtype: list[str]