in scrooge-generator/src/main/scala/com/twitter/scrooge/backend/Generator.scala [480:495]
def genProtocolReadMethod(t: FunctionType): CodeFragment = {
@scala.annotation.tailrec
def getCode(t: FunctionType): String = t match {
case at: AnnotatedFieldType => getCode(at.unwrap)
case TBool => "readBool"
case TByte => "readByte"
case TI16 => "readI16"
case TI32 => "readI32"
case TI64 => "readI64"
case TDouble => "readDouble"
case TString => "readString"
case TBinary => "readBinary"
case x => throw new ScroogeInternalException("genProtocolReadMethod#" + t)
}
v(getCode(t))
}