*         }
         *     }
         *
         * the compiler reports "Variable 'K' must be initialized". This happens because there is no guarantee that the companion object
         * was initialized at the time when we use `C.K` for the enum entry `ONE`. To avoid this type of compiler errors, we don't shorten
         * the reference if it is a part of the enum companion object, and it is used by the enum entry initialization.
         */