public function exists($uri = false, $httpMethod = false)
    {
        // If wanting to check if a passed in uri and method have a path mapping
        if ($uri && $httpMethod) {
            $this->routeProcess($uri, $httpMethod);
        }
        
        // After a URI is processed, it should result in a controller path being set if a 
        // matching one exists. If not set, that means there was no matching controller to given URI.
        if (!isset($this->controllerPath)) {
            return false;
        }
        return true;
    }