What is the purpose of IsSpatializationEffectInitialized?

I was wondering if anyone could describe the purpose of the IsSpatializationEffectInitialized callback in the IAudioSpatialization class. I would like to know in the case it has some use I am not aware of.

I see it is explained in the source as Returns whether or not the spatialization effect has been initialized

From what I can tell it appears not to be called at all, only because I have a ue_log in there that never appears in the output log. If I return true or false I don’t notice any particular difference. I am a novice with C++, so this may be an incorrect approach.

Thanks for any help!