Transform.MakePureCombTransformfunctor to build the function to map a signal to a new combinatorial signal representation
module B : MakePureCombTransform_argtype t = B.tval transform : t transform_fn'val rewrite :
t transform_fn' ->
Signal.t Base.Map.M(Hardcaml__.Signal.Uid).t ->
Signal.t Base.list ->
t Base.listval rewrite_signals : t transform_fn' -> Signal.t Base.list -> t Base.list