unsucbsribe from topic concode_field_sep FCMListener mFCMListener concode_elem_sep FCMManager instance concode_elem_sep Context mContext concode_elem_sep BroadcastReceiver mMessageReceiver concode_field_sep void init concode_elem_sep void unRegisterListener concode_elem_sep void onMessage concode_elem_sep void subscribeTopic concode_elem_sep FCMManager getInstance concode_elem_sep void onReceive concode_elem_sep void registerListener
void function ( String arg0 ) { if ( PrefsHelper . hasFCMToken ( mContext ) ) { FirebaseMessaging . getInstance ( ) . unsubscribeFromTopic ( arg0 ) ; } }