code: public void addHandler(CacheMissHandler handler) {
  		if(handler != null) {
  			logger.debug("adding handler of class '{}'", handler.getClass());
  			handlers.add(handler);
  		}
  	}
docs: Appends a <code>CacheMissHandler</code> to the internal list of handlers.
  
  @param handler
  the <code>CacheMissHandler</code> to be added.