static function get_qa_transformer() { if (is_null(self::$qa_transformer)) { $rmdQualityTest = new DomDocument(); $rmdQualityTest->load(REGISTRY_APP_PATH . 'registry_object/transforms/quality_report.xsl'); $qualityTestproc = new XSLTProcessor(); $qualityTestproc->importStyleSheet($rmdQualityTest); self::$qa_transformer = $qualityTestproc; } return self::$qa_transformer; }