Chapter 7 - SYNC CODE | FX Book Questions | Forum

In 7.3.7, in the processAudioFrame function there are two function calls

WaitForUIChangeDone();
setProcessAudioDone(false);

In the comments, these are called SYNC CODE. I guess they make the process frame function wait for any UI adjustment to be accomplished before the processAudioFrame function begins?

These two functions aren't defined in my directory. Could I be linked to their code, or given some pointers on how to implement them?

I think I have the most recent version of RackAFX

Thank you in advance!!