Is custom partitioner config supported?

[andrii...@weq.com]

In some implementations of librdkafka (for example the one for C\C++) there is already a configuration parameter called partitioner 

But when I try it in PHP version I get something like:
No such configuration property: \"partitioner\": RdKafka\\Conf->set('partitioner', 'murmur2_random')

Is it still not supported or I am missing something?

Thanks in advance for any tip.