deleteById return; controller abstract

src/Utils/LuBusiness.php

 
     /**
      * @param $id int
+     * @return true
      */
     public static function deleteById($id)
     {
-        static::getDataAccess()->deleteById($id);
+        $res = static::getDataAccess()->deleteById($id);
+        if (!$res)
+            self::notFound(static::getResourceName() . " not found");
+        return true;
     }
 
     /**

src/Utils/LuController.php

 
 use Laravel\Lumen\Routing\Controller as BaseController;
 
-class LuController extends BaseController
+abstract class LuController extends BaseController
 {
+    /**
+     * @return LuBusiness
+     */
+    protected abstract function getBusiness();
+
+    public function getAll($page = 0, $perPage = PHP_INT_MAX)
+    {
+        return self::getBusiness()->getAll($page, $perPage);
+    }
 }

src/Utils/LuDataAccess.php

 
     /**
      * @param $id int
+     * @return bool
      */
     public static function deleteById($id)
     {
         $data = self::_getModelById($id);
         if (is_null($data))
-            return;
+            return false;
         $data->delete();
+        return true;
     }
 
     /**