code: public static <T> void start(T query, long correlationId, EventBus bus, String... labels) {
  
          for (String label : labels) {
              AddLabelledQuery<T> next = start(query, correlationId, label, null);
              bus.post(next);
          }
  
      }
docs: Publish start events for each of the specified query types
  
  <pre>
  {@code
  LabelledEvents.start("get", 1l, bus, "typeA", "custom");
  try {
  return "ok";
  } finally {
  RequestEvents.finish("get", 1l, bus, "typeA", "custom");
  }
  }
  </pre>
  
  @param query Completed query
  @param correlationId Identifier
  @param bus EventBus to post events to
  @param labels Query labels to post to event bus