@Test void server_missingSr() {
    Span v2 =
      Span.newBuilder()
        .traceId("1")
        .id("2")
        .name("get")
        .kind(Kind.SERVER)
        .localEndpoint(BACKEND)
        .timestamp(1472470996199000L)
        .duration(207000L)
        .build();

    V1Span v1 =
      V1Span.newBuilder()
        .traceId("1")
        .id("2")
        .name("get")
        .timestamp(1472470996199000L)
        .duration(207000L)
        .addAnnotation(1472470996406000L, "ss", BACKEND)
        .build();

    assertThat(v1SpanConverter.convert(v1)).containsExactly(v2);
  }
Fix a v1 reported half in new style and half in old style, ex via a bridge
zipkin/src/test/java/zipkin2/v1/SpanConverterTest.java