@Test void messageWithMultipleSpans_json2() throws Exception {
    messageWithMultipleSpans(builder("multiple_spans_json2"), SpanBytesEncoder.JSON_V2);
  }
Ensures list encoding works: a version 2 json list of spans
zipkin-collector/rabbitmq/src/test/java/zipkin2/collector/rabbitmq/ITRabbitMQCollector.java