_.iterators = {
accumulate: accumulate,
accumulateWithReturn: accumulateWithReturn,
foldl: foldl,
reduce: foldl,
unfold: unfold,
unfoldWithReturn: unfoldWithReturn,
map: map,
select: select,
reject: reject,
filter: select,
find: find,
slice: slice,
drop: drop,
take: take,
List: List,
Tree: Tree,
constant: K,
K: K,
numbers: numbers,
range: range