Laravel - 如何使用雄辩的子函数访问静态变量

Question

i'm very new to laravel and need help with a static function problem.

I want to access models within a sub-function created with the eloquent chunk functionality:

class test
{

public static function test_run ()
   {
   static $GlobalValues = GlobalValues::where("key", "test")->first();
   static $Stats = Stats::where("stat", "test")->first();

   User::chunk(1000, function ($users) {
                  ... some code ...
              %GlobalValues->test = "test";
              %GlobalValues->save();

              %Stats->statistic1 = 12345;
              %Stats->save();
              });


   }
}

Maybe, if this is possible, i would prefer if i could access to the $GlobalValues all over the application without to query it every time?