protected function loadControlsFrom($frags)
 {
     if (!is_string($frags) or $frags == '') {
         throw new BadMethodCallException("Provide path components in a space separated list", 1);
     }
     $frags = explode(' ', trim($frags));
     $pathfrags = array($this->_includesPath);
     foreach ($frags as $frag) {
         array_push($pathfrags, $frag);
     }
     $controlsFolder = implode(DIRECTORY_SEPARATOR, $pathfrags);
     // fetch all *Control.php in the controls folder
     foreach (glob($controlsFolder . '/*CustomControl.php') as $fileName) {
         // MultiImageControl.php will have a slug of 'multi-image'
         $slug = tad_Str::hyphen(preg_replace('/CustomControl/', '', basename($fileName, '.php')));
         // store the controls that come with the library
         // again presumin PSR-o compliancy the class name will be the same
         // as the filename
         $this->customControls[$slug] = implode('\\', $frags) . '\\' . basename($fileName, '.php');
     }
 }