code: public function override($name, array $routeData)
  	{
  		if (!isset($this->routes[$name])) {
  			throw new \InvalidArgumentException("No route for name $name defined");
  		}
  
  		$this->routes[$name] = $routeData + $this->routes[$name];
  	}
docs: Override an existing route.
  
  @param  string $name
  @param  array  $routeData
  
  @return void