private void replaceToReference(MapEntryModel entry) {
   for (DFPropModel child : entry.getChild()) {
     if (child instanceof MapModel) {
       boolean update = false;
       DFPropModel[] elements = child.getChild();
       for (int i = 0; i < elements.length; i++) {
         DFPropModel element = elements[i];
         if (element instanceof NamedModel) {
           try {
             IFile refFile = getReferencesFile((NamedModel) element);
             if (refFile.exists()) {
               String source = getReferencesSource(refFile);
               DFPropFileModel propModel = new DFPropModelParser().parse(source);
               propModel.setFileName(refFile.getName());
               propModel.setFilePath(refFile.getProjectRelativePath().toString());
               propModel.setReferences(true);
               elements[i] = new DFPropReferenceModel((NamedModel) element, propModel);
               update = true;
             }
           } catch (CoreException e) {
           }
         }
       }
       if (update) {
         ((MapModel) child).replaceChild(elements);
       }
     }
   }
 }
  /**
   * Create DFMapModel for Document.
   *
   * @return Map Property Model Object.
   */
  protected DFPropFileModel createDFModel() {
    IEditorInput input = getEditorInput();
    IDocument document = getDocumentProvider().getDocument(input);
    String source = document.get();
    DFPropFileModel propModel = new DFPropModelParser().parse(source);
    String name = input.getName();
    propModel.setFileName(name);
    if (input instanceof IFileEditorInput) {
      IFile file = ((IFileEditorInput) input).getFile();
      propModel.setFilePath(file.getProjectRelativePath().toString());
    }

    if (canSplitMapFile()) {
      loadReferenceModel(propModel);
    }
    return propModel;
  }