Can’t find detailed Dnd Kit docs

I try to use React DND Kit and their docs are quite clear when I’m building a simple dnd. But they have examples which show us enormous variety of possibilities with this library. However when I try to check code of this example it shows me this:

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I cannot understand what this <OverflowWrapper> what is <DraggableStory> and so on thus I cannot learn how to use everything what this library suggests

I thought maybe there is something in their docs but this docs looks way to small and there is obviously no info about what is mentioned in examples:

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So is there an adequate docs where I can find all this info anywhere?