code: public void cacheBaseStatistics(BaseStatistics statistics, String identifier) {
  		synchronized (this.baseStatisticsCache) {
  			this.baseStatisticsCache.put(identifier, statistics);
  		}
  	}
docs: Caches the given statistics. They are later retrievable under the given identifier.
  
  @param statistics The statistics to cache.
  @param identifier The identifier which may be later used to retrieve the statistics.