code: public void queueEvent(String eventCollection, Map<String, Object> event,
                             Map<String, Object> keenProperties) {
          queueEvent(null, eventCollection, event, keenProperties, null);
      }
docs: Queues an event in the default project with no callbacks.
  
  @see #queueEvent(KeenProject, String, java.util.Map, java.util.Map, KeenCallback)
  @param eventCollection The name of the collection in which to publish the event.
  @param event           A Map that consists of key/value pairs. Keen naming conventions apply (see
  docs). Nested Maps and lists are acceptable (and encouraged!).
  @param keenProperties  A Map that consists of key/value pairs to override default properties.
  ex: "timestamp" -&gt; Calendar.getInstance()