(
#comment
(let config (DataSource 'config))

(let res_sink (DataSink 'result))

(let world (Write! world res_sink (Key) (StartsWith (Utf8 '12345) (String '"")) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (Just (String '12345)) (String '124)) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (String '12345) (Just (String '123456))) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (Just (String '567)) (Just (Utf8 '56))) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (Utf8 'abcad) (String 'ab)) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (Utf8 'xyz) (Utf8 'xyz)) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (Utf8 'one) (Null)) '('('type))))
(let world (Write! world res_sink (Key) (StartsWith (Null) (Utf8 'two)) '('('type))))

(let world (Write! world res_sink (Key) (EndsWith (Utf8 '12345) (String '"")) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (Just (String '12345)) (String '346)) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (String '12345) (Just (String '012345))) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (Just (String '567)) (Just (Utf8 '67))) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (Utf8 'abcad) (String 'ad)) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (Utf8 'xyz) (Utf8 'xyz)) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (Utf8 'one) (Null)) '('('type))))
(let world (Write! world res_sink (Key) (EndsWith (Null) (Utf8 'two)) '('('type))))

(let world (Commit! world res_sink))
(return world)
)