String registrationToken ="something";
Message message = Message.builder()
    .putData("score","850")
    .putData("time","2:45")
    .setToken(registrationToken)
    .build();

String response = FirebaseMessaging.getInstance().send(message);
System.out.println("Successfully sent message: " + response);

我正在eclipse IDE中工作。上面是Java代码。我收到以下异常。我应该如何解决？

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap
at com.google.firebase.messaging.Message