@abc.abstractmethod
    def calculatePrice(self, order, price, quantity, bar, volumeUsed):
        raise NotImplementedError()
Returns the "_items" array inside a given data type dictionary.
dataset/ETHPy150Open gbeced/pyalgotrade/pyalgotrade/broker/slippage.py/SlippageModel.calculatePrice--crossover with--dataset/ETHPy150Open google/simian/src/simian/mac/common/hw.py/SystemProfile._GetDataTypeItems