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------------ desugared source code
hello = _lhs hello (_rhs ())

x = _lhs x (_rhs world)
------------ core code
hello :: ()
hello = _rhs ()

x :: String
x = _rhs "world"
------------ tooltips
3:1-3:6
    ()
3:9-3:11
    ()
4:1-4:2
    String
4:5-4:10
    String