def _instantiate_session(self, session_data, session_cache):
    raise NotImplementedError()
Describes the actual delivery service (Mail, FedEx, DHL, UPS, etc)
dataset/ETHPy150Open JeremyOT/Toto/toto/dbconnection.py/DBConnection._instantiate_session--crossover with--dataset/ETHPy150Open dokterbob/satchmo/satchmo/apps/shipping/modules/tieredquantity/models.py/Shipper.method