grub-imageboot documentation??? -was [Re: How to install gparted live on grub boot menu?]

[Richard Owlett]

On 10/30/2021 11:21 AM, josep lladonosa capell wrote:
> Hello, Bo,
>
> > From what I have read I suppose that you just want to boot an ISO image
> from grub, right?
>
> One solution for me (I don't work on an EFI system, though) without extra
> partitioning and without the need of a bootable USB device and which does
> all the grub stuff for you  is just installing the package grub-imageboot.
> Install it in your main Ubuntu bootable system (Desktop).
> [snip]

Is grub-imageboot itself documented some where?
My web search gave lots of "howto install" hits which would pretty much 
apply to installing anything.
Several hits link to http://syslinux.zytor.com/wiki/index.php/MEMDISK 
for the limitations of memdisk.
TIA