Tezos_raw_protocol_011_PtHangz2.Fitness_repr
val from_int64 : int64 -> bytes list
val to_int64 : bytes list -> (int64, Tezos_protocol_environment_011_PtHangz2.Error_monad.error Tezos_protocol_environment_011_PtHangz2.Error_monad.trace) Tezos_protocol_environment_011_PtHangz2.Pervasives.result