presto-spi/src/main/java/io/prestosql/spi/connector/ConnectorNodePartitioningProvider.java/ConnectorNodePartitioningProvider/getBucketFunction
class ConnectorNodePartitioningProvider:    BucketFunction getBucketFunction(
            ConnectorTransactionHandle transactionHandle,
            ConnectorSession session,
            ConnectorPartitioningHandle partitioningHandle,
            List<Type> partitionChannelTypes,
            int bucketCount);