LrC SDK function to purge Adobe Camera Raw cache

I have been over the SDK documentation and can't find a function to purge the Adobe Camera Raw cache. I am writing a plugin to automate some performance testing with different configurations and image types.  One of the tests is a scroll through the Library module in Loupe view.  Of course there is a significant difference on some images before previews are in ACR and after. 

I would like my plugin to purge the cache before every run of the test but can't find a way to do that in the SDK.