The feature to find the value inside the nested map.

[瀬川昂弘]

Assuming,
Map = #{a => b,c => #{1 => 2,3 => 4,5 => #{x => y}}}.

Expected:
maps:new_find_fun(Key = 5, Map) = {ok,#{x => y}}.

It's useful there is the above feature, in my guess.

-- 
Takahiro Segawa.
E-mail：123430024@REDACTED
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