Telegram Bot API Extensions for API
· API extensions which provide work with RequestsExecutor of TelegramBotAPI almost like it is described in original Telegram Bot API reference
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 TelegramBotAPI-extensions-api-0.28.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.