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