public function getdropColeccion()
 {
     $data = Coleccion::find()->asArray()->all();
     return ArrayHelper::map($data, 'id', 'nombre');
 }
 /**
  * Lists all Coleccion models.
  * @return mixed
  */
 public function actionIndex()
 {
     $dataProvider = new ActiveDataProvider(['query' => Coleccion::find()]);
     return $this->render('index', ['dataProvider' => $dataProvider]);
 }