public static boolean isSchemaEnumerated(final PsiElement element) {
    if (element instanceof XmlTag) {
      final XmlTag simpleContent = XmlUtil.getSchemaSimpleContent((XmlTag)element);
      if (simpleContent != null && XmlUtil.collectEnumerationValues(simpleContent, new HashSet<>())) {
        return true;
      }                  
    }
    if (element instanceof XmlAttributeValue) {
      final PsiElement parent = element.getParent();
      if (parent instanceof XmlAttribute) {
        final XmlAttributeDescriptor descriptor = ((XmlAttribute)parent).getDescriptor();
        if (descriptor != null && descriptor.isEnumerated()) {
          return true;
        }

        String[] enumeratedValues = XmlAttributeValueGetter.getEnumeratedValues((XmlAttribute)parent);
        if (enumeratedValues.length > 0) {
          String value = descriptor == null ? null : descriptor.getDefaultValue();
          if (value == null || enumeratedValues.length != 1 || !value.equals(enumeratedValues[0])) {
            return true;
          }
        }
      }
    }
    return false;
  }
public static boolean isSchemaEnumerated(final PsiElement element)