protected Couple<String> doAction(Project project, PsiElement psiElement, I18nizeQuickFixModel model) {
    if (!model.hasValidData()) {
      return null;
    }
    final String key = model.getKey();
    final String value = model.getValue();

    final Collection<PropertiesFile> selectedPropertiesFiles = model.getAllPropertiesFiles();
    createProperty(project, psiElement, selectedPropertiesFiles, key, value);

    return Couple.of(key, value);
  }
protected Couple<String> doAction(Project project, PsiElement psiElement, I18nizeQuickFixModel model)