RecyclerView
· This library is built on top of the AndroidX RecyclerView library and is designed to be used with Android 4.0 (API level 14) and higher.
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 recyclerview-3.0.11.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.