apiRouter.ServeHTTP(recV4, reqV4)
		if recV4.Code != testCase.expectedRespStatus {
			t.Errorf("Test %d: %s: Expected the response status to be `%d`, but instead found `%d`", i+1, instanceType, testCase.expectedRespStatus, recV4.Code)
		}
		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
		recV2 := httptest.NewRecorder()

				}
				if cause != "" {
					check.errorf(recv, InvalidRecv, "invalid receiver type %s (%s)", rtyp, cause)
				}
			case *Basic:
				check.errorf(recv, InvalidRecv, "cannot define new methods on non-local type %s", rtyp)
			default:
				check.errorf(recv, InvalidRecv, "invalid receiver type %s", recv.typ)
			}
		}).describef(recv, "validate receiver %s", recv)
	}

	sig.params = NewTuple(params...)

  RecvTPUEmbeddingActivationsOp recv_op;
  if (failed(GetOp(region, &recv_op))) return failure();

  SendTPUEmbeddingGradientsOp send_op;
  if (failed(GetOp(region, &send_op))) return failure();

  // No TPU embedding ops.
  if (!recv_op && !send_op) return success();

  Location loc = recv_op ? recv_op.getLoc() : send_op.getLoc();
  StringRef config = recv_op ? recv_op.getConfig() : send_op.getConfig();

	} else {
		m.send(message{Op: OpDisconnectClientMux, MuxID: m.ID})
	}
	// Unlock, since we are calling deleteMux, which will call close - which will lock recvMu.
	if locked {
		m.recvMu.Unlock()
		defer m.recvMu.Lock()
	}
	m.parent.deleteMux(true, m.ID)
}

func (m *muxServer) send(msg message) {
	m.sendMu.Lock()
	defer m.sendMu.Unlock()
	msg.MuxID = m.ID
	msg.Seq = m.SendSeq

		// Call the ServeHTTP to execute the handler.
		apiRouter.ServeHTTP(recV2, reqV2)
		if recV2.Code != testCase.expectedRespStatus {
			t.Errorf("Test %d: %s: Expected the response status to be `%d`, but instead found `%d`", i+1, instanceType, testCase.expectedRespStatus, recV2.Code)
		}

		// read the response body.
		actualContent, err = io.ReadAll(recV2.Body)
		if err != nil {

		// Call the ServeHTTP to execute the handler.
		apiRouter.ServeHTTP(recV2, reqV2)
		if recV2.Code != testCase.expectedRespStatus {
			t.Errorf("Test %d: %s: Expected the response status to be `%d`, but instead found `%d`", i+1, instanceType, testCase.expectedRespStatus, recV2.Code)
		}

		errorResponse = APIErrorResponse{}
		err = xml.Unmarshal(recV2.Body.Bytes(), &errorResponse)
		if err != nil && !testCase.shouldPass {

			mpos := r.pos()
			mname := r.ident()

			// TODO(mdempsky): Matches bimport.go, but I
			// don't agree with this.
			var recv *types.Var
			if base != nil {
				recv = types.NewVar(token.NoPos, r.currPkg, "", base)
			}

			msig := r.signature(recv, nil, nil)
			methods[i] = types.NewFunc(mpos, r.currPkg, mname, msig)
		}

		typ := types.NewInterfaceType(methods, embeddeds)

	s = strings.TrimPrefix(s, "*")
	pkg, name, ok = splitDocName(s)
	var recv string
	if ok {
		pkg, recv, _ = splitDocName(pkg)
	}
	if pkg != "" {
		if err := module.CheckImportPath(pkg); err != nil {
			return "", "", false
		}
	}
	if recv != "" {
		name = recv + "." + name
	}
	return pkg, name, true
}

		// nothing to do

	case *GenDecl:
		if n.Doc != nil {
			Walk(v, n.Doc)
		}
		walkList(v, n.Specs)

	case *FuncDecl:
		if n.Doc != nil {
			Walk(v, n.Doc)
		}
		if n.Recv != nil {
			Walk(v, n.Recv)
		}
		Walk(v, n.Name)
		Walk(v, n.Type)
		if n.Body != nil {
			Walk(v, n.Body)
		}

	// Files and packages
	case *File:
		if n.Doc != nil {
			Walk(v, n.Doc)
		}

			fd := int(fdPtr)

			_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)

			_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)

			// Enable custom socket send/recv buffers.
			if opts.SendBufSize > 0 {
				_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_SNDBUF, opts.SendBufSize)
			}

			if opts.RecvBufSize > 0 {