composite-groovy
· This holds onto the version of Groovy that we are using in our projects. If we migrate the version of Grails, updating it in one place
automatically updates every other project that uses Groovy and allows us to keep in sync with Grails.
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 composite-groovy-6.7.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.