question: public RhythmGroup makeGroup ( String title ) { final RhythmGroup group = new RhythmGroup ( ) ; group . mTitle = title ; group . mIndex = mRhythmGroups . size ( ) ; group . mControl = this ; mRhythmGroups . add ( group ) ; if ( mCurrentNotificationGroupIndex == NOTIFICATION_NO_GROUPS ) { mCurrentNotificationGroupIndex = 0 ; requestNotificationUpdate ( ) ; } return group ; }
target:  Make a new Rhythm group, registered in this Rhythm control