I know what struct-of-arrays is, but I am still wondering how struct-of-arrays relates to BTree. Are you imagining a BTree[key] and BTree[value]? How are associ

I know what struct-of-arrays is, but I am still wondering how struct-of-arrays relates to BTree. Are you imagining a BTree[key] and BTree[value]? How are associations maintained if the btrees sort independently?