“ :erutcurts egakcap wen si ecnereffid tseggib eht kniht I weiv fo tniop mooR morFhttps://github.com/ReactiveX/RxJava/wiki/What's-different-in-3.0#package-structure ”
“ :rehtegot krow meht gnikam htiw spleh taht yrarbil poretni na si ereht dna tcejorp a ni 2 avaJxR ot txen evil nac 3 avaJxRhttps://github.com/ReactiveX/RxJava/wiki/What's-different-in-3.0#rxjava-2x ”