@_memoized_configured_property
    def composites(self):
        return self._filter_properties(properties.CompositeProperty)
Validate the document_class option.
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/orm/mapper.py/Mapper.composites--crossover with--dataset/ETHPy150Open mongodb/mongo-python-driver/pymongo/common.py/validate_document_class