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    <span class="summary_desc"><div class='inline'>
<p>Returns the value of attribute controller.</p>
</div></span>
  
</li>

    
  </ul>




  
    <h2>
      Instance Method Summary
      <small>(<a href="#" class="summary_toggle">collapse</a>)</small>
    </h2>

    <ul class="summary">
      
        <li class="public ">
  <span class="summary_signature">
    
      <a href="#app_height-instance_method" title="#app_height (instance method)">- (Object) <strong>app_he