code: private function getLogArgs($cleared)
      {
          $cleared = \array_filter($cleared);
          if (!$cleared) {
              return array();
          }
          $count = \count($cleared);
          $glue = $count == 2
              ? ' and '
              : ', ';
          if ($count > 2) {
              $cleared[$count-1] = 'and '.$cleared[$count-1];
          }
          $msg = 'Cleared '.\implode($glue, $cleared);
          if ($this->channelName) {
              return array(
                  $msg.' %c(%s)',
                  'background-color:#c0c0c0; padding:0 .33em;',
                  $this->channelName,
              );
          }
          return array($msg);
      }
docs: Build message that gets appended to log
  
  @param array $cleared array of things that were cleared
  
  @return string