def fast_hash(self):
        """
        Get a CRC32 or xxhash.xxh64 reflecting the DataStore.

        Returns
        ------------
        hashed: int, checksum of data
        """
        fast = sum(i.fast_hash() for i in self.data.values())
        return fast
Get a CRC32 or xxhash.xxh64 reflecting the DataStore.

        Returns
        ------------
        hashed: int, checksum of data