scala.NotImplementedError: an implementation is missing                                                                                               >
        at scala.Predef$.$qmark$qmark$qmark(Predef.scala:344)                                                                                          >
        at wvlet.airframe.http.netty.NettyRequestHandler.channelRead0(NettyRequestHandler.scala:60)                                                    >
        at wvlet.airframe.http.netty.NettyRequestHandler.channelRead0(NettyRequestHandler.scala:51)                                                    >
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)