title: Check when the last function
body: <p>If i'm calling 2 or 3 times a function, like this:</p>
  
  <pre><code>somefunction();
  somefunction();
  </code></pre>
  
  <p>How could i know when is the last time the function has been called?<br>
  i'm asking that because i want the last function to do one more thing.</p>