T () { if (myMergedModel == null) { final DomManager domManager = DomManager.getDomManager(myProject); return domManager.createModelMerger().mergeModels(myClass, ContainerUtil.mapNotNull(myConfigFiles, (NullableFunction<XmlFile, T>)xmlFile -> { DomFileElement<T> fileElement = domManager.getFileElement(xmlFile, myClass); return fileElement == null ? null : fileElement.getRootElement(); })); } return myMergedModel.getRootElement(); }