code: public function getCombinedFile($strUrl=null)
  	{
  		if (Config::get('debugMode'))
  		{
  			return $this->getDebugMarkup();
  		}
  
  		return $this->getCombinedFileUrl($strUrl);
  	}
docs: Generate the combined file and return its path
  
  @param string $strUrl An optional URL to prepend
  
  @return string The path to the combined file