title: What does the AT symbol mean in KOTLIN
body: <p>What does the @ symbol mean in this code clip?</p>
  
  <p>Learning</p>
  
  <pre><code>  @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
      fun onResume() {
          log.i(LOG_TAG, "OnResume")
      }
  </code></pre>