title: The argument type 'RxInt' can't be assigned to the parameter type 'int'
body: <p>I define 2 RxInt variable in controller class. But when I was calculate sum of two number then I got error: The argument type 'RxInt' can't be assigned to the parameter type 'int'. Bellow my code:</p>
  <pre><code>class LogicController extends GetxController {
    RxInt number = 0.obs;
    RxInt thirdNumber = 0.obs;
  
    void count() {
      number++;
    }
  
    void thirdNumberCount() {
      thirdNumber++;
    }
  
    addTwoNumber() {
      return  number + thirdNumber; // error 
    }
  }
  </code></pre>