public function run()
    {
        if ($this->binding instanceof \Closure) {
            return call_user_func_array($this->binding, $this->parameters);
        }
        
        if (is_object($this->binding)) {
            return $this->binding;
        }
        
        if (is_string($this->binding)) {
            /*
             * @todo Implement this functionality
             */
            return null;
        }
        
        return $this->binding;
    }