Helper.
Example
:kind! Eval (PairMaybeToMaybePair '( 'Just "txt", 'Just 1))Eval (PairMaybeToMaybePair '( 'Just "txt", 'Just 1)) :: Maybe (Symbol, TL.Natural) = 'Just '("txt", 1)
Instances3Eval
type Eval (PairMaybeToMaybePair '('Just a, 'Just b)) = 'Just '(a, b)Defined in fcf-containers-0.8.2 · Fcf.Alg.Othertype Eval (PairMaybeToMaybePair '('Nothing, _1)) = 'NothingDefined in fcf-containers-0.8.2 · Fcf.Alg.Othertype Eval (PairMaybeToMaybePair '(_1, 'Nothing)) = 'NothingDefined in fcf-containers-0.8.2 · Fcf.Alg.Other