code: protected HtmlResponse doRedirect(Class<?> actionType, UrlChain chain) {
          assertArgumentNotNull("actionType", actionType);
          assertArgumentNotNull("chain", chain);
          return newHtmlResponseAsRedirect(toActionUrl(actionType, chain));
      }
docs: Do redirect the action with the more URL parts and the the parameters on GET. <br>
  This method is to other redirect methods so normally you don't use directly from your action.
  @param actionType The class type of action that it redirects to. (NotNull)
  @param chain The chain of URL to build additional info on URL. (NotNull)
  @return The HTML response for redirect containing GET parameters. (NotNull)