How to change mogrt font via ExtendScript API in Premiere Pro?

[SammyIO]

How to change mogrt font via ExtendScript API in Premiere Pro?

I recently came across "Premiere Composer" and was a bit puzzled.
Surprisingly, mogrt was able to change font styles, including fonts, and also supported undo and redo.

As far as I know, Premiere Pro does not support undo and redo for results executed with the ExtendScript API. It also does not support changing fonts or font styles.

Is this a feature that falls within the scope of the PProPanel, ExtendScript API?
I'm very curious how this is possible.

Am I missing something?

[Dan McSweeney · Accepted solution]

Hi SammyIO

Once installed, one can browse the /extensions directory to see that Premiere Composer uses the same PPro ExtendScript APIs (including unsupported QE DOM) used by all PPro panels. Premiere Composer also includes OS-specific code libraries, which perform magic that's opaque to outsiders. 

I suspect that the extension accesses and forcibly modifies the .json associated with .mogrt param sets (thereby entirely bypassing the supported APIs for modifying .mogrt parameters). It's clever, sure, but even if we did know exactly what the extension is doing, it wouldn't be right to post it here.