Is there a case when proof of inclusion contains multiple trees in a single key? #505
Description
While decoding POI's I've noticed that MPTrees in each key (like accounts) are wrapped with an extra list that had a length of either 1 (single tree) or 0 (no trees). Are there cases, when its length, is more than 1? How it should be interpreted?
An example of POI: pi_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