Add a scaldoc comment for groupRandomly.
Add a scaldoc comment for groupRandomly.

rubanm/scalding,cauchycui/scalding,bendridi/scalding,Chasego/scalding,avp1984/scalding,tglstory/scalding,soundcloud/scalding,tglstory/scalding,Chasego/scalding,piyushnarang/scalding,nkhuyu/scalding,rubanm/scalding,zirpins/scalding,Chasego/scalding,nvoron23/scalding,AaroC357/scalding,twitter/scalding,MansurAshraf/scalding,aposwolsky/scalding,AaroC357/scalding,nkhuyu/scalding,sriramkrishnan/scalding,MansurAshraf/scalding,epishkin/scalding,jzmq/scalding,twitter/scalding,zirpins/scalding,piyushnarang/scalding,tdyas/scalding,sid-kap/scalding,sunilrebel/scalding,danosipov/scalding,f7753/scalding,rubanm/scalding,tresata/scalding,vidyar/twitterscalding,danosipov/scalding,benpence/scalding,chrismoulton/scalding,MansurAshraf/scalding,benpence/scalding,nvoron23/scalding,tresata/scalding,stripe/scalding,jzmq/scalding,sid-kap/scalding,aposwolsky/scalding,tresata/scalding,avp1984/scalding,AaroC357/scalding,cchepelov/scalding,sid-kap/scalding,stripe/scalding,avp1984/scalding,zirpins/scalding,danosipov/scalding,JiJiTang/scalding,aposwolsky/scalding,cauchycui/scalding,lucamilanesio/scalding,lucamilanesio/scalding,sunilrebel/scalding,chrismoulton/scalding,bmyerz/scalding,bendridi/scalding,wanyifu/scaldingtest,f7753/scalding,sunilrebel/scalding,wanyifu/scaldingtest,tdyas/scalding,sriramkrishnan/scalding,JiJiTang/scalding,bmyerz/scalding,sriramkrishnan/scalding,JiJiTang/scalding,bendridi/scalding,cchepelov/scalding,jzmq/scalding,twitter/scalding,cauchycui/scalding,bmyerz/scalding,piyushnarang/scalding,oeddyo/scalding,vidyar/twitterscalding,f7753/scalding,nvoron23/scalding,soundcloud/scalding,lucamilanesio/scalding,cchepelov/scalding,wanyifu/scaldingtest,epishkin/scalding,oeddyo/scalding,oeddyo/scalding,rjhall/etsy.scalding,tglstory/scalding,nkhuyu/scalding,tdyas/scalding,soundcloud/scalding,chrismoulton/scalding,benpence/scalding,rjhall/etsy.scalding