code: public void addProvider(String name, MetricsProvider provider) {
          if(log.isInfoEnabled()) {
              log.info("Adding Provider: " + provider.getClass().getName() + "=" + name);
          }
  		
          container.put(name, provider);
  	}
docs: Add a MetricsProvider to this container.
  @param name the name of the MetricsProvider.
  @param provider the MetricsProvider instance.