title: How to override a property setter using short form?
body: <p>I just wanna override a default setter using short form but I failed:  </p>
  
  <pre><code>class MyViewModel: ViewModel() {
      var progress: Int = 0
          set(value) = MathUtils.clamp(value, 0, 100)
  }
  </code></pre>
  
  <p>It says <code>Required: Unit but found: Int</code>.</p>
  
  <p><strong>What am I doing wrongly?</strong></p>