Can't find a class in Mahout library for version 0.9.0.2.2.0.0-2041

Hi ,
I couldn’t find the class org.apache.mahout.fpm.pfpgrowth.convertors.string.TopKStringPatterns in mahout libraries with version 0.9.0.2.2.0.0-2041. Can you kindly tell me what is the alternative for this or which jar provides this class now?

Thanks and Regards
Anish C