Returns a list of hashes with serial numbers between start
         and end, both inclusive.

def _readMultiple(self, start, end, db):
        """
        Returns a list of hashes with serial numbers between start
         and end, both inclusive.
         """
        self._validatePos(start, end)
        # Converting any bytearray to bytes
        return [bytes(db.get(str(pos))) for pos in range(start, end + 1)]