When reading NestedParents and NestedChildren docs one after the other, one somehow feels that the docs of NestedChildren might be wrong.
NestedParents has some means to select "all parents" and search for "wanted children", so one would expect NestedChildren would somehow have selectors for "wanted parents" and "all children", but the docs tell about "all_parents" and "wanted_parents".
When looking at the NestedChildren code, first param seems to be related to parents and second param seem to be related to children. But in the docs, they are both about parents.
Please check. :-)