allprojects {
    repositories {
      ...
      maven { url 'https://jitpack.io' }
    }
}

        dependencies {
            compile 'com.google.firebase:firebase-core:11.2.0'
            compile 'com.github.erdalceylan:com-google-firebase-messaging:v1-11.2.0'
        }

@WorkerThread
    public void onMessageReceived(RemoteMessage var1) {
    }