static Span.Builder newSpanBuilder() {
    return Span.newBuilder().name("get")
      .timestamp(TODAY * 1000L + 100L)
      .duration(200 * 1000L)
      .localEndpoint(FRONTEND)
      .putTag("environment", "test");
  }
Reuse a builder as it is significantly slows tests to create 100000 of these!
zipkin/src/test/java/zipkin2/TestObjects.java