@Test protected void looksBackIndefinitely(TestInfo testInfo) throws Exception {
    String testSuffix = testSuffix(testInfo);
    List<Span> trace = newTrace(testSuffix);

    processDependencies(trace);

    assertThat(store().getDependencies(endTs(trace), DAY).execute())
      .containsExactlyInAnyOrderElementsOf(links(testSuffix));
  }
Some systems log a different trace id than the root span. This seems "headless", as we won't
see a span whose id is the same as the trace id.
zipkin-tests/src/main/java/zipkin2/storage/ITDependencies.java