<auto-generated stub>
def _1(): Rep[A]
def _2(): Rep[B]
def toString(): Rep[String]
def pack(t: Tuple2[Rep[A],Rep[B]]): Rep[Tup2[A,B]]
def pack(x: Tuple2[Var[A],Rep[B]]): Rep[Tup2[A,B]]
def pack(x: Tuple2[Rep[A],Var[B]]): Rep[Tup2[A,B]]
def pack(x: Tuple2[Var[A],Var[B]]): Rep[Tup2[A,B]]
def unpack(t: Rep[Tup2[A,B]]): Tuple2[Rep[A],Rep[B]]