Type Definition spirit_tokio::net::TcpListenWithLimits

type TcpListenWithLimits<ExtraCfg = Empty, TcpStreamConfigure = TcpConfig> = WithLimits<TcpListen<ExtraCfg, TcpStreamConfigure>>;

Convenience type alias for configuration fragment for TCP listening socket with handling of accept errors and limiting number of current connections.

You might prefer this one over plain TcpListen.