ss='ivar'>@attributes</span>
<span class='kw'>end</span></pre>
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      <span id="callback=-instance_method"></span>
      <div class="method_details ">
  <h3 class="signature " id="callback-instance_method">
  
    #<strong>callback</strong>  &#x21d2; <tt>Object</tt> 
  

  

  
</h3><div class="docstring">
  <div class="discussion">
    
<p>Returns the value of attribute callback.</p>


  </div>
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  <t