@Override
  public void checkApplicability(final PsiFile psiFile, final Editor editor) throws IncorrectOperationException {
    UPolyadicExpression concatenation = getEnclosingLiteral(psiFile, editor);
    if (concatenation != null) return;
    String message = JavaI18nBundle.message("quickfix.i18n.concatentation.error");
    throw new IncorrectOperationException(message);
  }
@Override
  public void checkApplicability(final PsiFile psiFile, final Editor editor)