<auto-generated stub>
def _1(): Rep[A]
def _2(): Rep[B]
def _3(): Rep[C]
def _4(): Rep[D]
def toString(): Rep[String]
def pack(t: Tuple4[Rep[A],Rep[B],Rep[C],Rep[D]]): Rep[Tup4[A,B,C,D]]
def unpack(t: Rep[Tup4[A,B,C,D]]): Tuple4[Rep[A],Rep[B],Rep[C],Rep[D]]