@Override
    public boolean isAvailable(@NotNull Project project,
                               @NotNull PsiFile file,
                               @NotNull PsiElement startElement,
                               @NotNull PsiElement endElement) {
      return startElement instanceof XmlAttribute;
    }
@Override
    public boolean isAvailable(@NotNull Project project,
                               @NotNull PsiFile file,
                               @NotNull PsiElement startElement,
                               @NotNull PsiElement endElement)