segment analytics-core
· This package represents core 'shared' functionality that is shared by analytics packages. This is not designed to be used directly, but internal to analytics-node and analytics-browser.
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 analytics-core-1.3.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.