@Override
    public VirtualGateway getGateway() {
        return mGateway;
    }
TCP protocol virtual gateway tunnel wraps {@link TcpProxyTunnel} and {@link TcpRemoteTunnel} as
client and server.

@author Megatron King
@since 2018-11-18 00:19
netbare-core/src/main/java/com/github/megatronking/netbare/tunnel/TcpVATunnel.java