code: public function all($group = '*')
      {
          $this->sort();
  
          $cssList = $this->getLoadedCssList($group);
          $jsList  = $this->getLoadedJsList($group);
  
          list($cssList, $jsList) = $this->fireEvent('load.all', [ & $cssList, & $jsList ]);
  
          $cssList = $this->transformListToLinkHtmlNodes($cssList);
          $jsList  = $this->transformListToScriptHtmlNodes($jsList);
  
          return implode("\n", $cssList)."\n".implode("\n", $jsList);
      }
docs: Returns both CSS and JS tags from given group name.
  If group name is asterisk (*), will return from all loaded groups.
  @param  string $group Group name.
  @return string HTML tags as string.