proc new(T: typedesc[DcutrClient]; connectTimeout = 15.seconds;
         maxDialableAddrs = 8): T:type {....raises: [].}

proc startSync(self: DcutrClient; switch: Switch; remotePeerId: PeerId;
               addrs: seq[MultiAddress]): InternalRaisesFuture[void,
    (DcutrError, CancelledError)] {....stackTrace: false, raises: [], gcsafe,
                                    raises: [], tags: [RootEffect], forbids: [].}