peer.acceptFrame() // DATA STREAM 3
    peer.play()

    // Play it back.
    val connection = connect(peer)
    val stream1 = connection.newStream(headerEntries("a", "android"), true)
    val stream2 = connection.newStream(headerEntries("b", "banana"), true)
    connection.writePingAndAwaitPong() // Ensure the GO_AWAY that resets stream2 has been received.
    val sink1 = stream1.getSink().buffer()

    check(!client) { "Client cannot push requests." }
    return newStream(associatedStreamId, requestHeaders, out)
  }

  /**
   * Returns a new locally-initiated stream.
   *
   * @param out true to create an output stream that we can use to send data to the remote peer.
   *     Corresponds to `FLAG_FIN`.
   */
  @Throws(IOException::class)
  fun newStream(
    requestHeaders: List<Header>,
    out: Boolean,

			t.Fatalf("Unexpected error: %v, %T", err, err)
		}
		// Streams should not be able to set up until registered.
		// Thus, the error is a local error.
		_, err = remoteConn.NewStream(context.Background(), handlerTest, []byte(testPayload))
		if !errors.Is(err, ErrUnknownHandler) {
			t.Fatalf("Unexpected error: %v, %T", err, err)
		}
	})
}

func TestSingleRoundtripGenerics(t *testing.T) {

    })
```

Sample call:
```go
    // Get a connection to the remote host
    conn := manager.Connection(host).Subroute("asubroute")
	
    payload := []byte("request")
    stream, err := conn.NewStream(ctx, grid.HandlerDiskInfo, payload)
	if err != nil {
        return err
    }
    // Read results from the stream
    err = stream.Results(func(result []byte) error {

	sharedResponse bool
}

// NewStream creates a typed handler that can provide Marshal/Unmarshal.
// Use Register to register a server handler.
// Use Call to initiate a clientside call.
// newPayload can be nil. In that case payloads will always be nil.
// newReq can be nil. In that case no input stream is expected and the handler will be called with nil 'in' channel.

					if conn == nil {
						b.Fatal("No connection")
					}
					ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
					// Send the payload.
					t := time.Now()
					st, err := conn.NewStream(ctx, handlerTest, payload)
					if err != nil {
						if debugReqs {
							fmt.Println(err.Error())
						}
						b.Fatal(err.Error())
					}
					got := 0
					err = st.Results(func(b []byte) error {

	<-gotCall
	remote.debugMsg(debugKillInbound)
	local.debugMsg(debugKillInbound)
	<-gotResp

	// Must reconnect
	errFatal(remoteConn.WaitForConnect(context.Background()))

	stream, err := remoteConn.NewStream(context.Background(), handlerTest2, []byte(testPayload))
	errFatal(err)
	go func() {
		for resp := range stream.responses {
			t.Log("Resp:", resp, err)
		}
		gotResp <- struct{}{}
	}()

	<-gotCall

	// Ensure remote has the same disk ID.
	opts.DiskID = *client.diskID.Load()
	b, err := opts.MarshalMsg(grid.GetByteBuffer()[:0])
	if err != nil {
		return toStorageErr(err)
	}

	st, err := client.gridConn.NewStream(ctx, grid.HandlerWalkDir, b)
	if err != nil {
		return toStorageErr(err)
	}
	return toStorageErr(st.Results(func(in []byte) error {
		_, err := wr.Write(in)
		return err
	}))
}

  override fun writeRequestHeaders(request: Request) {
    if (stream != null) return

    val hasRequestBody = request.body != null
    val requestHeaders = http2HeadersList(request)
    stream = http2Connection.newStream(requestHeaders, hasRequestBody)
    // We may have been asked to cancel while creating the new stream and sending the request
    // headers, but there was still no stream to close.
    if (canceled) {

		}
		client.cancelFn(context.Canceled)
		c.outgoing.Delete(client.MuxID)
	}()
	return client.traceRoundtrip(ctx, c.trace, h, req)
}

// NewStream creates a new stream.
// Initial payload can be reused by the caller.
func (c *Connection) NewStream(ctx context.Context, h HandlerID, payload []byte) (st *Stream, err error) {
	if !h.valid() {
		return nil, ErrUnknownHandler
	}
	if c.State() != StateConnected {