ydb/yql/essentials/tests/s-expressions/suites/InMem/AccessDictOpt.yqls

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

(let res_sink (DataSink 'result))
(let t (ToDict (AsList '((String 'dkey1) (String 'dvalue1)) '((String 'dkey2) (String 'dvalue2)))
   (lambda '(x) (Nth x '0)) (lambda '(x) (Nth x '1)) '('Sorted 'One)
))

(let jt (Just t))
(let n (Nothing (TypeOf jt)))

(let world (Write! world res_sink (Key) (Contains jt (String 'dkey1)) '('('type))))
(let world (Write! world res_sink (Key) (Contains jt (String 'dkeyx)) '('('type))))
(let world (Write! world res_sink (Key) (Contains n (String 'dkey1)) '('('type))))
(let world (Write! world res_sink (Key) (Contains n (String 'dkeyx)) '('('type))))

(let world (Write! world res_sink (Key) (Lookup jt (String 'dkey1)) '('('type))))
(let world (Write! world res_sink (Key) (Lookup jt (String 'dkeyx)) '('('type))))
(let world (Write! world res_sink (Key) (Lookup n (String 'dkey1)) '('('type))))
(let world (Write! world res_sink (Key) (Lookup n (String 'dkeyx)) '('('type))))

(let world (Write! world res_sink (Key) (DictItems jt) '('('type))))
(let world (Write! world res_sink (Key) (DictItems n) '('('type))))

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