presto-tpch/src/main/java/io/prestosql/plugin/tpch/TpchNodePartitioningProvider.java/TpchNodePartitioningProvider/getSplitBucketFunction
class TpchNodePartitioningProvider:    @Override
    public ToIntFunction<ConnectorSplit> getSplitBucketFunction(ConnectorTransactionHandle transactionHandle, ConnectorSession session, ConnectorPartitioningHandle partitioningHandle)
    {
        return value -> ((TpchSplit) value).getPartNumber();
    }