Load the vectorized representations of the stored data files
        Args:
            train: Whether to load train data
            test: Whether to load test data

def load(self, train=True, test=True, shuffle=True) -> tuple:
        """
        Load the vectorized representations of the stored data files
        Args:
            train: Whether to load train data
            test: Whether to load test data
        """
        return self.__load(self.__load_files, train, test, shuffle=shuffle)