kotlin-minecraft-script-server
· Kotlin/JS wrapper for @minecraft/server.Contains many types related to manipulating a Minecraft world, including entities, blocks, dimensions, and more.
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 kotlin-minecraft-script-server-1.0.0-dev1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.