Is it possible to edit a file in whiptail?

For a new TUI, I want to employ whiptail or dialog to make it a bit more visually appealing. Afaik, whiptail is more widely available and even preinstalled on many systems, which is a good reason to use it. (Is that still true?) But a nice-to-have feature would be to be able to seamlessly edit files in the TUI. In dialog, there is the option --editbox. **Is there something similar for whiptail?** I couldn't find it in the man pages, but it would not be the first time, that I am just not seeing something O_o .