code: public static function slotDir($sourceDir, array $options)
      {
          $paths = array(
              sprintf(
                  '%s/pages/pages/%s/%s_%s/%s',
                  $sourceDir,
                  $options['page'],
                  $options['language'],
                  $options['country'],
                  $options['slot']
              ),
              sprintf('%s/slots/%s/%s_%s', $sourceDir, $options['slot'], $options['language'], $options['country']),
              sprintf('%s/slots/%s', $sourceDir, $options['slot']),
          );
  
          return self::cascade($paths);
      }
docs: Looks for the current slots dir. Slots are sought in cascade in pages folders, languages repeated slots and site
  repeated slots
  
  @param $sourceDir
  @param array $options
  
  @return null|string