@Override
  public PsiElement getValueDeclaration(XmlElement attributeValue, String value) {
    PsiElement declaration = super.getValueDeclaration(attributeValue, value);
    if (declaration == null && !myExhaustiveEnum) {
      return getDeclaration();
    }
    return declaration;
  }
@Override
  public PsiElement getValueDeclaration(XmlElement attributeValue, String value)