Code completion for CI 2.x in PhpED 15 stop working.

My example:

require APPPATH.'/libraries/REST_Controller.php';
class Rest extends REST_Controller {

public function __construct()
{
parent::__construct();
}

function test_get() {
$this->load->model('Rest_api_model');
$this->Rest_api_model->writeAccess();
$this->response($this->Rest_api_model->test(), 200); // 200 being the HTTP response code
}
}

When I right click on writeAccess in PhpED 12 and use "Find Declaration", editor open file Rest_api_model.php and show function writeAccess. In PhpED 15 I get error:

---------------------------
Error
---------------------------
Failed to find "$Rest_api_model" local variable
Failed to identify type of \Rest->Rest_api_model property

Does anyone have the same problem?