presto-blackhole/src/main/java/io/prestosql/plugin/blackhole/BlackHoleNodePartitioningProvider.java/BlackHoleNodePartitioningProvider/getSplitBucketFunction
class BlackHoleNodePartitioningProvider:    @Override
    public ToIntFunction<ConnectorSplit> getSplitBucketFunction(
            ConnectorTransactionHandle transactionHandle,
            ConnectorSession session,
            ConnectorPartitioningHandle partitioningHandle)
    {
        return value -> {
            throw new PrestoException(NOT_SUPPORTED, "Black hole connector does not supported distributed reads");
        };
    }