title: Why do I get errors for _setActiveMenu and _addBreadcrumb?
body: <blockquote>
    <p>Fatal error: Call to undefined method
    Desbest_Brands_Adminhtml_BrandsController::_addBreadcrumb() in
    /home/desbest/public_html/clients/magentofull/app/code/local/Desbest/Brands/controllers/Adminhtml/BrandsController.php
    on line 8</p>
    
    <p>Fatal error: Call to undefined method
    Desbest_Brands_Adminhtml_BrandsController::_setActiveMenu() in
    /home/desbest/public_html/clients/magentofull/app/code/local/Desbest/Brands/controllers/Adminhtml/BrandsController.php
    on line 7</p>
  </blockquote>
  
  <p>From what I see, the <code>Data.php</code> file inside <code>Helpers/</code> folder should be left as it is blank like what the tutorials say.</p>
  
  <p>So what's with the errors?</p>