public function import($name)
    {
        $object = null;
        if (!isset($this->modules[$name])) {
            if (isset($this->moduleMap[$name])) {
                $object_class = $this->moduleMap[$name];
                $object = new $object_class();
                $object->setSystem($this);
                $object->setEventLoop($this->eventLoop);
                $this->modules[$name] = $object;
            }
        }
        else{
            $object = $this->modules[$name]; 
        }

        return $object;

    }