@Nullable
 private static XmlTag getAnchor(
     @NotNull XmlTag contextTag, Editor editor, XmlElementDescriptor selected) {
   XmlContentDFA contentDFA = XmlContentDFA.getContentDFA(contextTag);
   int offset = editor.getCaretModel().getOffset();
   if (contentDFA == null) {
     return null;
   }
   XmlTag anchor = null;
   boolean previousPositionIsPossible = true;
   for (XmlTag subTag : contextTag.getSubTags()) {
     if (contentDFA.getPossibleElements().contains(selected)) {
       if (subTag.getTextOffset() > offset) {
         break;
       }
       anchor = subTag;
       previousPositionIsPossible = true;
     } else {
       previousPositionIsPossible = false;
     }
     contentDFA.transition(subTag);
   }
   return previousPositionIsPossible ? null : anchor;
 }
 @Override
 public void annotate(@NotNull final PsiElement element, @NotNull AnnotationHolder holder) {
   final PsiFile containingFile = element.getContainingFile();
   if (!JavaFxFileTypeFactory.isFxml(containingFile)) return;
   if (element instanceof XmlAttributeValue) {
     final String value = ((XmlAttributeValue) element).getValue();
     if (!JavaFxPsiUtil.isExpressionBinding(value)
         && !JavaFxPsiUtil.isIncorrectExpressionBinding(value)) {
       final PsiReference[] references = element.getReferences();
       for (PsiReference reference : references) {
         if (reference instanceof JavaFxColorReference) {
           attachColorIcon(element, holder, StringUtil.unquoteString(element.getText()));
           continue;
         }
         final PsiElement resolve = reference.resolve();
         if (resolve instanceof PsiMember) {
           if (!JavaFxPsiUtil.isVisibleInFxml((PsiMember) resolve)) {
             final String symbolPresentation =
                 "'" + SymbolPresentationUtil.getSymbolPresentableText(resolve) + "'";
             final Annotation annotation =
                 holder.createErrorAnnotation(
                     element,
                     symbolPresentation
                         + (resolve instanceof PsiClass
                             ? " should be public"
                             : " should be public or annotated with @FXML"));
             if (!(resolve instanceof PsiClass)) {
               annotation.registerUniversalFix(
                   new AddAnnotationFix(
                       JavaFxCommonNames.JAVAFX_FXML_ANNOTATION,
                       (PsiMember) resolve,
                       ArrayUtil.EMPTY_STRING_ARRAY),
                   null,
                   null);
             }
           }
         }
       }
     }
   } else if (element instanceof XmlAttribute) {
     final XmlAttribute attribute = (XmlAttribute) element;
     final String attributeName = attribute.getName();
     if (!FxmlConstants.FX_BUILT_IN_ATTRIBUTES.contains(attributeName)
         && !attribute.isNamespaceDeclaration()
         && JavaFxPsiUtil.isReadOnly(attributeName, attribute.getParent())) {
       holder.createErrorAnnotation(
           element.getNavigationElement(), "Property '" + attributeName + "' is read-only");
     }
     if (FxmlConstants.SOURCE.equals(attributeName)) {
       final XmlAttributeValue valueElement = attribute.getValueElement();
       if (valueElement != null) {
         final XmlTag xmlTag = attribute.getParent();
         if (xmlTag != null) {
           final XmlTag referencedTag = JavaFxBuiltInTagDescriptor.getReferencedTag(xmlTag);
           if (referencedTag != null) {
             if (referencedTag.getTextOffset() > xmlTag.getTextOffset()) {
               holder.createErrorAnnotation(
                   valueElement.getValueTextRange(), valueElement.getValue() + " not found");
             } else if (xmlTag.getParentTag() == referencedTag.getParentTag()) {
               final Annotation annotation =
                   holder.createErrorAnnotation(
                       valueElement.getValueTextRange(), "Duplicate child added");
               annotation.registerFix(
                   new JavaFxWrapWithDefineIntention(referencedTag, valueElement.getValue()));
             }
           }
         }
       }
     }
   } else if (element instanceof XmlTag) {
     if (FxmlConstants.FX_SCRIPT.equals(((XmlTag) element).getName())) {
       final XmlTagValue tagValue = ((XmlTag) element).getValue();
       if (!StringUtil.isEmptyOrSpaces(tagValue.getText())) {
         final List<String> langs =
             JavaFxPsiUtil.parseInjectedLanguages((XmlFile) element.getContainingFile());
         if (langs.isEmpty()) {
           final ASTNode openTag = element.getNode().findChildByType(XmlTokenType.XML_NAME);
           final Annotation annotation =
               holder.createErrorAnnotation(
                   openTag != null ? openTag.getPsi() : element, "Page language not specified.");
           annotation.registerFix(new JavaFxInjectPageLanguageIntention());
         }
       }
     }
   }
 }