Escaped Mutant for Mutator "ProtectedVisibility": --- Original +++ New @@ @@ throw new TypeError((string) message('Method `%method%` must declare `%type%` return type', method: static::runMethodFQN(), type: implode('|', $expect))); } } - protected static function assertMethod() : void + private static function assertMethod() : void { if (!method_exists(static::class, static::RUN_METHOD)) { throw new LogicException((string) message('Action `%action%` does not define %invoke% method', action: static::class, invoke: static::RUN_METHOD));