protected function instantiate($id)
    {
        $this->instances[$id] = call_user_func($this->callbacks[$id], $this);
    }
protected function instantiate($id)
    {
        $this->instances[$id] = call_user_func($this->callbacks[$id], $this);
    }
protected function instantiate ( $ id ) { $ this -> instances [ $ id ] = call_user_func ( $ this -> callbacks [ $ id ] , $ this ) ; }
Instantiates specified service.

@param string $id
Instantiates specified service .