title: Google App Script Add-Ons createAddonMenu() create a Help menu. How to call it?
body: <p>With the new Google App Script (new spreadsheet) when I create a menu for my Add-Ons using <code>createAddonMenu()</code> you will notice that Google add automatically a separator and a Help menu at the end. But I found nowhere documentation that tells what is the name of the function associated with the Help. </p>
  
  <p>Would anybody know?</p>
  
  <pre><code>function onOpen(e) {
    SpreadsheetApp.getUi().createAddonMenu()
    .addItem('Test A', 'insertChart')
    .addItem('Test B', 'updateCharts')
    .addItem('Test C', 'updateCharts')
    .addToUi();
  }
  </code></pre>
  
  <p><img src="https://i.imgur.com/E7WH19T.png" alt="Help Menu"></p>