Next.continue_ or Next.returnSuccess depending on whether the arguments chosen mean the program should proceed or not.
GetOptException if an unknown flag is passed.
Kameloso instance; Next next = handleGetopt(instance); if (next == Next.returnSuccess) return 0; // ...
Reads command-line options and applies them over values previously read from the configuration file, as well as dictates some other behaviour.
The priority of options then becomes getopt over config file over hardcoded defaults.