How to programmatically open a currently closed folder using API

I've managed to programmatically open a folder in the folder tree using the following:

finder.api.openFolder('Images', '/pathtofolder');

I appreciate that CKFinder uses 'on request' loading of folders, and understand the logic behind this. I also understand according to the docs that the openFolder function 'will only work for folders that CKFinder is already aware of'.

Nevertheless, I need to be able to programmatically open a currently hidden (i.e. closed) folder in the tree view. Which would be the best way to achieve this, and how would this be coded?

Is there a method to achieve what I need to achieve through the API or do I need to expand the whole tree (either on set-up of CKFinder or programmatically)? Does anyone have any example code for this?

Thanks in advance for any assistance.