public function head($module, $controller): Link
    {
        return $this->addMap(RequestMethod::HEAD, $module, $controller);
    }
public function head($module, $controller): Link
    {
        return $this->addMap(RequestMethod::HEAD, $module, $controller);
    }
public function head ( $ module , $ controller ) : Link { return $ this -> addMap ( RequestMethod :: HEAD , $ module , $ controller ) ; }
Add mapping for HEAD method

@param  string $module
@param  string $controller
@return Link
Add mapping for HEAD method