static boolean closeEnoughEndpoint(Span.Builder builder, Endpoint e) {
    Endpoint localEndpoint = builder.localEndpoint();
    if (localEndpoint == null) {
      builder.localEndpoint(e);
      return true;
    }
    return hasSameServiceName(localEndpoint, e);
  }
Allows you to split a v1 span when necessary. This can be the case when reading merged
client+server spans from storage or parsing old data formats.

<p>This type isn't thread-safe: it re-uses state to avoid re-allocations in conversion loops.
zipkin/src/main/java/zipkin2/v1/V1SpanConverter.java