code: @Override
    public Optional<HttpTracing> build(final Environment environment) {
      if (!isEnabled()) {
        LOGGER.warn("Zipkin tracing is disabled");
        return Optional.empty();
      }
  
      LOGGER.info("Dropping all collected spans");
      return buildTracing(environment, Reporter.NOOP);
    }
docs: Build a new {@link HttpTracing} instance for interfacing with Zipkin
  
  @param environment Environment
  @return HttpTracing instance