@NotNull
  @Override
  protected PsiElementPredicate getElementPredicate() {
    return new PsiElementPredicate() {
      @Override
      public boolean satisfiedBy(@NotNull PsiElement element) {
        return element instanceof GrLiteral &&
               GrStringUtil.isStringLiteral((GrLiteral)element) &&
               !GrStringUtil.removeQuotes(element.getText()).isEmpty() &&
               !GrStringUtil.isSlashyString(((GrLiteral)element));
      }
    };
  }
@NotNull
  @Override
  protected PsiElementPredicate getElementPredicate()