retval := discovery.DiscoveryResponse{}
	if len(responses) == 0 {
		return &retval, nil
	}

	for _, response := range responses {
		// Combine all the shards as one, even if that means losing information about
		// the control plane version from each shard.
		retval.ControlPlane = response.ControlPlane
		retval.Resources = append(retval.Resources, response.Resources...)

				makeGateway("bookinfo-valid", "bookinfo", true, true),
				makeGateway("no-name-convention", "default", true, true),
				makeGatewayWithRevision("bookinfo-rev", "bookinfo", true, true, "rev1"),
			},
			expectedOutFile: "combined-gateway",
		},
	}
	for _, tt := range cases {
		t.Run(tt.name, func(t *testing.T) {
			ctx := cli.NewFakeContext(&cli.NewFakeContextOption{
				Namespace: "default",
			})
			client, err := ctx.CLIClient()

	}
	fmt.Fprintf(w, tagCreatedStr, tagName, revision, tagName)
	return nil
}

func analyzeWebhook(name, istioNamespace, wh, revision string, config *rest.Config) error {
	sa := local.NewSourceAnalyzer(analysis.Combine("webhook", &webhook.Analyzer{}), "", resource.Namespace(istioNamespace), nil)
	if err := sa.AddReaderKubeSource([]local.ReaderSource{{Name: "", Reader: strings.NewReader(wh)}}); err != nil {
		return err
	}

	gwMsg, err := checkGatewayAPIs(cli)
	if err != nil {
		return nil, err
	}
	msgs = append(msgs, gwMsg...)

	// TODO: add more checks

	sa := local.NewSourceAnalyzer(
		analysis.Combine("upgrade precheck", &maturity.AlphaAnalyzer{}),
		resource.Namespace(ctx.Namespace()),
		resource.Namespace(ctx.IstioNamespace()),
		nil,
	)
	if err != nil {
		return nil, err
	}

			if istiodReset && outputLogLevel != "" {
				logCmd.Println(logCmd.UsageString())
				return fmt.Errorf("--level cannot be combined with --reset")
			}
			if istiodReset && stackTraceLevel != "" {
				logCmd.Println(logCmd.UsageString())
				return fmt.Errorf("--stack-trace-level cannot be combined with --reset")
			}
			return nil
		},
		RunE: func(logCmd *cobra.Command, args []string) error {

				cmd.Println(cmd.UsageString())
				return fmt.Errorf("log requires pod name or --selector")
			}
			if reset && loggerLevelString != "" {
				cmd.Println(cmd.UsageString())
				return fmt.Errorf("--level cannot be combined with --reset")
			}
			if outputFormat != "" && outputFormat != summaryOutput {
				return fmt.Errorf("--output is not applicable for this command")
			}
			return nil
		},

		return err
	}
	for k, v := range ret {
		if !strings.EqualFold(k, "authorization") {
			if _, ok := dst[k]; ok {
				return fmt.Errorf("underlying %s credentials contain a %s header which is already present in the combined credentials", kind, k)
			}
			dst[k] = v
		} else {
			dst[dstHdr] = v
		}
	}
	return nil
}

type hubMembership struct {
	WorkloadIdentityPool string
}

			if err := common.validateArgs(cmd, args); err != nil {
				return err
			}
			if reset && loggerLevelString != "" {
				cmd.Println(cmd.UsageString())
				return fmt.Errorf("--level cannot be combined with --reset")
			}
			if common.outputFormat != "" && common.outputFormat != summaryOutput {
				return fmt.Errorf("--output is not applicable for this command")
			}
			return nil
		},