Acc.
-callback iter(t(K, V), fun((K, V) -> any())) ->
Acc.
-callback iter(t(K, V), fun((K, V) -> any())) ->
%% TODO: Decide if validation is to be done. If yes - wrap in hope_result:t/1
-callback of_kv_list([{K, V}]) ->
%% TODO: Decide if validation is to be done. If yes - wrap in hope_result:t/1
-callback of_kv_list([{K, V}]) ->