[hueyp]

`REQUIRED_CHILDREN` used to not be in docs -- only code. This is what I had in mind when I said partial.

I don't know which, but I think one of the `RANGE_DELETE` vs `NODE_DELETE` said it could take a list of ids but only one of them could -- it was something like this at least ... maybe path vs key? I don't remember how it was documented -- this is what I had in mind when I said wrong.

I didn't submit PR's btw -- I suck at open source :).