Force Media Refresh: Only for growing media?

[hellopaul4]

I noticed today that (back in release 24.2.0.25), this was added:

Force Media Refresh

Adds a custom command to the source monitor and the keyboard shortcuts for forcing a refresh on growing media.

• There is now a new keyboard command & optional Source Monitor button shortcut for forcing a manual refresh on growing media files. Set the command to any keyboard shortcut you wish in the keyboard shortcut editor. (v24.2.0.25)

"Ooooh" I thought, "will this be like a 'Reload Footage' in AE?" No, I don't think it is...unless (I hope) I'm wrong? Is it ONLY for growing media files (eg. image sequences as they're being rendered)? It'd be SO nice to have an AE-style "Reload footage" - please! (I've assigned it to a keyboard shortcut, but it doesn't seem to do anything exciting on non-growing footage).

T'internet doesn't seem to be aware of its existence:

I've also searched the PPro online manual, with no results.