What is the $with variable / -with parameter for?

[sql-sith]

I'm almost too embarrassed to ask this because I think I'm missing something obvious. A custom theme has one requirement: to implement a PS function called Write-Theme. That function has two parameters, $lastCommandFailed and $with. I have been mucking around with themes and noticed that the $with parameter never seems to have a value. So I searched the code for instances of $with and -with, but only found this:

• This wasn't what I was looking for, but in the interest of completeness ... every theme.psm1 is a match because each one implements Write-Theme.
• Also not a real match: the README.md files mentions $with when explaining how to create custom themes.
• The module file oh-my-posh.psm1 defines a global function called Write-WithPrompt which in turn has a line in it that called Write-Theme -lastCommandFailed $lastCommandFailed -with $command.
• Write-WithPrompt is not called from anywhere else in the code.
• Write-WithPrompt receives $command as a parameter and does nothing with it but pass it to either Write-Theme or to Write-ClassicPrompt.
• Write-ClassicPrompt, like Write-Theme, is not mentioned anywhere else in the code.

So I've been wondering: what is the purpose of this parameter that never seems to have a value, is almost never referenced in the code, and when it is referenced it seems to fall from the sky, showing up in a function that is not called from anywhere? :)

Actually, I assume that Write-WithPrompt is a callback to build the prompt, but I honestly can't tell what $command/$with actually do. Can you help me out? If they don't do anything, I can simplify my themes. :)

Thanks!

[JanDeDobbeleer]

With is actually another utility I had which shipped with oh-my-posh a long time ago. There's little use nowadays though.

[sql-sith]

Thank you!