11 using YieldKey = std::tuple<Bin, Process, Cut>;
const Cut & GetCut(const YieldKey &yk)
std::tuple< Bin, Process, Cut > YieldKey
const Bin & GetBin(const YieldKey &yk)
const Process & GetProcess(const YieldKey &yk)
std::ostream & operator<<(std::ostream &stream, const YieldKey &key)