title: Custom Eclipse warning on an annotation
body: <p>Let's say I have an internal method, which should be used only in certain situations.</p>
  
  <p>Is there any possibility, in Eclipse, to mark it as internal and show a warning when used to prevent me or people who will use my API to use it by mistake not knowing what they're doing. I can't change its visibility as it might be used in other packages/non-extending classes too.</p>
  
  <p>Something like this:</p>
  
  <pre><code>@Internal
  public void doSomeInternalStuff()
  {
      // ...
  }
  </code></pre>
  
  <p>And then, a warning in Eclipse:</p>
  
  <p><img src="https://i.stack.imgur.com/HuvS6.jpg" alt="enter image description here"></p>
  
  <p>You get the point.</p>
  
  <p>Any hope?</p>