code: public void add(double lat, double lon, long time, T t, Optional<R> id) {
          Info<T, R> info = new Info<T, R>(lat, lon, time, t, id);
          add(info);
      }
docs: Adds a record to the in-memory store with the given position and time and
  id.
  
  @param lat
  latitude
  @param lon
  longitude
  @param time
  time in epoch ms
  @param t
  object
  @param id
  identifier