private void registerListeners() {
   int count = 0;
   for (BaseEventBus bus : mBusesToMonitor) {
     bus.registerListener(this);
     ++count;
   }
   for (BaseEventBus bus : mBusesToStickyMonitor) {
     bus.registerListener(this, true);
     ++count;
   }
   i("Registered at %d event buses.", count);
 }