Desktop notifications duration

[dpetka2001]

I was reading about desktop notifications and I was trying the code in the examples

printf '\x1b]99;i=1:d=0;Hello world\x1b\\'
printf '\x1b]99;i=1:d=1:p=body;This is cool\x1b\\'

and I'm wondering if there's some kind of additional flag that controls the duration of the notification's visibility. I read through the link in the docs, but couldn't find anything.

[kovidgoyal]

There are no parameters other than documented ones.

[dpetka2001]

Is there some other way to extend the duration of the notifications visibility to your knowledge ?