MainThreadSupport getMainThreadSupport() {
        if (mainThreadSupport != null) {
            return mainThreadSupport;
        } else if (AndroidComponents.areAvailable()) {
            return AndroidComponents.get().defaultMainThreadSupport;
        } else {
            return null;
        }
    }
Set a specific log handler for all EventBus logging.
<p/>
By default, all logging is via {@code android.util.Log} on Android or System.out on JVM.
EventBus/src/org/greenrobot/eventbus/EventBusBuilder.java