@Override
        public boolean execute(final @NotNull PsiElement element) {
          if (element instanceof XmlTag) {
            String forValue = ((XmlTag)element).getAttributeValue(IdReferenceProvider.FOR_ATTR_NAME);
            if (forValue != null) {
              result.add(forValue);
            }
          }
          return true;
        }
@Override
        public boolean execute(final @NotNull PsiElement element)