Airline - Backwards Compatibility - javax.inject
· Provides a pointer to the old javax.inject dependency. This is an intentional level of indirection
within the dependency tree to make it clear that this dependency is only needed for backwards compatibility.
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 airline-backcompat-javaxinject-2.9.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.