added business transact method

src/Utils/Business/LuBusiness.php

@@ -34,6 +34,15 @@ abstract class LuBusiness {
         throw new LuBusinessException($reason, 400);
     }
 
+    /**
+     * @param \Closure $function
+     * @return mixed
+     */
+    public static function transact(\Closure $function)
+    {
+        return static::getDataAccess()->transact($function);
+    }
+
     /**
      * @param $id int
      * @return LuDbo