code: private void placePerson(final Map<String, Set<PersonRenderer>> aMap,
              final PersonRenderer renderer, final String place) {
          final Set<PersonRenderer> locatedPersons =
                  personRendererSet(aMap, place);
          locatedPersons.add(renderer);
      }
docs: Add a person to a particular location in the map.
  
  @param aMap the map
  @param renderer the PersonRenderer
  @param place the current place