presto-blackhole/src/main/java/io/prestosql/plugin/blackhole/BlackHoleHandleResolver.java/BlackHoleHandleResolver/getPartitioningHandleClass
class BlackHoleHandleResolver:    @Override
    public Class<? extends ConnectorPartitioningHandle> getPartitioningHandleClass()
    {
        return BlackHolePartitioningHandle.class;
    }