Objects-api module
· The objects-api module exposes a wrapper around the Common Ground Objects API and features an implementation of the connector module interface
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 objects-api-10.6.0.RELEASE.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.