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val id = fn t :: Type => fn x : t => x
val id_self = id [t :: Type -> t -> t] id
val idi = fn t ::: Type => fn x : t => x
val idi_self = idi idi
val picker = fn na :: Name => fn a ::: Type => fn nb :: Name => fn b ::: Type => fn fs ::: {Type} =>
fn r : $([na = a, nb = b] ++ fs) => {na = r.na, nb = r.nb}
val getem = picker [#A] [#C] {A = 0, B = 1.0, C = "hi", D = {}}
val picker_ohmy = fn na ::: Name => fn a ::: Type => fn nb ::: Name => fn b ::: Type => fn fs ::: {Type} =>
fn r : $([na = a, nb = b] ++ fs) => {na = r.na, nb = r.nb}
val getem_ohmy = picker_ohmy {A = 0, B = 1.0, C = "hi", D = {}}
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