def test_add_interp_children(self):
        """Can correctly add layer data to interpretations"""
        message = {'99-5-Interp': [1, 2], '99-5-a-Interp': [3, 4]}
        l1, l2, l3, l4 = self.put_with_mock_data(
            message, '99', '99-Interp', '99-5-Interp', '99-5-a-Interp',