code: public void increment(String name, int value) {
  		Counter counter = get(name, CounterType.Increment);
  		counter.setCount(counter.getCount() != null ? counter.getCount() + value : value);
  		update();
  	}
docs: Increments counter by given value.
  
  @param name  a counter name of Increment type.
  @param value a value to add to the counter.