docs: public static void createAndRegister(
        SpanBytesEncoder encoder, Sender sender, String serviceName) {
      synchronized (monitor) {
        checkState(handler == null, "Zipkin exporter is already registered.");
        Handler newHandler = new ZipkinExporterHandler(encoder, sender, serviceName);
        handler = newHandler;
        register(Tracing.getExportComponent().getSpanExporter(), newHandler);
      }
    }