amity-push-fcm
· "Amity Social Cloud SDK is a software development kit provided by Amity for developers to integrate Amity's social features into their applications. The SDK includes a variety of features such as chat, social feeds, and user management."
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window amity-push-fcm-5.35.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.