public static @Nullable PsiClass getWritablePropertyClass(@Nullable XmlAttributeValue xmlAttributeValue) {
    if (xmlAttributeValue != null) {
      return getPropertyClass(getWritablePropertyType(xmlAttributeValue), xmlAttributeValue);
    }
    return null;
  }
public static @Nullable PsiClass getWritablePropertyClass(@Nullable XmlAttributeValue xmlAttributeValue)