How to load external storybook minimized in storybook composition?

[tim-mukhin]

Hi, I want to add to my storybook several external storybooks. But I don't want to load them all on every page load. Because I only need them from time to time.
Is it possible to lazy-load (minimized / folded) external storybooks?

I found this code which looks like about refs. And add refs: {<name>: {..., type: 'lazy'}}, but that did't work.
I didn't find any documentation about this topic.