}

func LightstepAddress(value string) Instance {
	return newOptionOrSkipIfZero("lightstep", value).withConvert(addressConverter(value))
}

func LightstepToken(value string) Instance {
	return newOption("lightstepToken", value)
}

func OpenCensusAgentAddress(value string) Instance {
	return newOptionOrSkipIfZero("openCensusAgent", value)
}

			key:         "lightstep",
			option:      option.LightstepAddress("127.0.0.1"),
			expectError: true,
		},
		{
			testName: "lightstep token",
			key:      "lightstepToken",
			option:   option.LightstepToken("fake"),
			expected: "fake",
		},
		{
			testName: "openCensusAgent address",
			key:      "openCensusAgent",
			option:   option.OpenCensusAgentAddress("fake-ocagent"),

      "name": "envoy.tracers.lightstep",
      "typed_config": {
        "@type": "type.googleapis.com/envoy.config.trace.v3.LightstepConfig",
        "collector_cluster": "lightstep",
        "access_token_file": "{{ .lightstepToken}}"
      }
    }
  }
  {{- else if .datadog }}
  ,
  "tracing": {
    "http": {
      "name": "envoy.tracers.datadog",
      "typed_config": {

			if err != nil {
				return nil, err
			}
			opts = append(opts, option.LightstepAddress(tracer.Lightstep.Address),
				option.LightstepToken(lightstepAccessTokenPath))
		case *meshAPI.Tracing_Datadog_:
			opts = append(opts, option.DataDogAddress(tracer.Datadog.Address))
		case *meshAPI.Tracing_Stackdriver_: