in scripts/tuple_serializers.scala [177:191]
def registerSp2(scalaVersion: String)(typeNm1: String, typeNm2: String): String =
scalaVersion match {
case "2.10" =>
"""newK.register(classOf[Tuple2$mcSHORT1SHORT2$sp], new Tuple2TYPE1TYPE2Serializer)"""
.replace("TYPE1", typeNm1)
.replace("SHORT1", typeMap(typeNm1))
.replace("TYPE2", typeNm2)
.replace("SHORT2", typeMap(typeNm2))
case _ =>
"""newK.register(Class.forName("scala.Tuple2$mcSHORT1SHORT2$sp"), new Tuple2TYPE1TYPE2Serializer)"""
.replace("TYPE1", typeNm1)
.replace("SHORT1", typeMap(typeNm1))
.replace("TYPE2", typeNm2)
.replace("SHORT2", typeMap(typeNm2))
}