(
#comment
(let config (DataSource 'config))
(let res_sink (DataSink 'result))
(let stream (Iterator (AsList (Int32 '1) (Int32 '2) (Int32 '3))))
(let data (Collect (Squeeze1 stream (lambda '(item) item) (lambda '(item state) (+ item state)) (Void) (Void))))
(let world (Write! world res_sink (Key) data '('('type))))
(let world (Commit! world res_sink))
(return world)
)