"name": "envoy.tracers.zipkin",
      "typed_config": {
        "@type": "type.googleapis.com/envoy.config.trace.v3.ZipkinConfig",
        "collector_cluster": "zipkin",
        "collector_endpoint": "/api/v2/spans",
        "collector_endpoint_version": "HTTP_JSON",
        "trace_id_128bit": true,
        "shared_span_context": false
      }
    }
  }
  {{- else if .lightstep }}
  ,
  "tracing": {

	return errs
}

// ValidateZipkinCollector validates the configuration for sending envoy spans to Zipkin
func ValidateZipkinCollector(z *meshconfig.Tracing_Zipkin) error {
	return ValidateProxyAddress(strings.Replace(z.GetAddress(), "$(HOST_IP)", "127.0.0.1", 1))
}

// ValidateDatadogCollector validates the configuration for sending envoy spans to Datadog
func ValidateDatadogCollector(d *meshconfig.Tracing_Datadog) error {

	"math"
	"strconv"
	"strings"
	"unicode"
	"unicode/utf8"
)

// Formatting issues:
// - better comment formatting for /*-style comments at the end of a line (e.g. a declaration)
//   when the comment spans multiple lines; if such a comment is just two lines, formatting is
//   not idempotent
// - formatting of expression lists
// - should use blank instead of tab to separate one-line function bodies from

		//   "The text in style, script, title, and textarea elements
		//   must not have an escaping text span start that is not
		//   followed by an escaping text span end."
		// Furthermore, spoofing an escaping text span end could lead
		// to different interpretation of a </script> sequence otherwise
		// masked by the escaping text span, and spoofing a start could

   *
   *  * If it is a control frame this will result in a single call to [FrameCallback].
   *  * If it is a message frame this will result in a single call to [FrameCallback.onReadMessage].
   *    If the message spans multiple frames, each interleaved control frame will result in a
   *    corresponding call to [FrameCallback].
   */
  @Throws(IOException::class)
  fun processNextFrame() {
    readHeader()

	}{
		{
			name:        "re-use otlp http headers",
			dtTenant:    dtTenant,
			dtClusterID: dtClusterID,
			expectedURI: authority + "/api/v2/samplingConfiguration",
		},
		{
			name:        "custom root spans per minute fallback",
			dtTenant:    dtTenant,
			dtClusterID: dtClusterID,
			expectedURI: authority + "/api/v2/samplingConfiguration",
			spansPerMin: 9999,
		},
	}

	for _, tc := range testcases {

	var sampling float64
	if useCustomSampler {
		// If the TracingProvider has a custom sampler (OTel Sampler)
		// the sampling percentage is set to 100% so all spans arrive at the sampler for its decision.
		sampling = 100
	} else if spec.RandomSamplingPercentage != nil {
		sampling = *spec.RandomSamplingPercentage
	} else {

These are the primary classes involved with establishing, sharing, and terminating connections:

 * **RealConnectionPool** manages reuse of HTTP and HTTP/2 connections for reduced latency. Every OkHttpClient has one, and its lifetime spans the lifetime of the OkHttpClient.

		}

		// Check if val points to a heap span.
		span := spanOfHeap(val)
		if span == nil {
			continue
		}

		// Check if val points to an allocated object.
		idx := span.objIndex(val)
		if span.isFree(idx) {
			continue
		}

		// val points to an allocated object. Mark it.
		obj := span.base() + idx*span.elemsize
		greyobject(obj, b, i, span, gcw, idx)
	}
}

	// - forEachGC above will run the provided function at some delay after each
	//   GC's mark phase terminates; finalizers are run after marking as the
	//   spans containing finalizable objects are swept, driven by GC
	//   background activity and allocation demand.

	// - "live at last GC" is not available through the current metrics