@Override
  protected void processIntention(@NotNull PsiElement element, @NotNull ActionContext context, @NotNull ModPsiUpdater updater) {
    String quote = element.getText().substring(0, 1);

    StringBuilder buffer = new StringBuilder();
    buffer.append(quote);

    GrExpression old;

    if (element instanceof GrLiteralImpl) {
      appendSimpleStringValue(element, buffer, quote);
      old = (GrExpression)element;
    }
    else {
      final GrStringImpl gstring = (GrStringImpl)element;
      for (GroovyPsiElement child : gstring.getAllContentParts()) {
        if (child instanceof GrStringContent) {
          appendSimpleStringValue(child, buffer, "\"");
        }
        else if (child instanceof GrStringInjection) {
          buffer.append(child.getText());
        }
      }
      old = gstring;
    }

    buffer.append(quote);
    try {
      final int offset = context.offset();
      final TextRange range = old.getTextRange();
      int shift;

      if (range.getStartOffset() == offset) {
        shift = 0;
      }
      else if (range.getStartOffset() == offset - 1) {
        shift = -1;
      }
      else if (range.getEndOffset() == offset) {
        shift = -4;
      }
      else if (range.getEndOffset() == offset + 1) {
        shift = -3;
      }
      else {
        shift = -2;
      }

      final GrExpression newLiteral = GroovyPsiElementFactory.getInstance(context.project()).createExpressionFromText(buffer.toString());
      old.replaceWithExpression(newLiteral, true);

      if (shift != 0) {
        updater.moveCaretTo(offset + shift);
      }
    }
    catch (IncorrectOperationException e) {
      LOG.error(e);
    }
  }
@Override
  protected void processIntention(@NotNull PsiElement element, @NotNull ActionContext context, @NotNull ModPsiUpdater updater)