static function set_xsl_path($xsl_path)
 {
     self::$xsl_path = $xsl_path;
 }
 /**
  * Remove test controller from global controller-stack.
  */
 function tearDown()
 {
     $this->controller->popCurrent();
     GnPublishMetadataCommand::set_xsl_path(self::$xsl_path);
     parent::tearDown();
 }