code: public static <K, V> ConvertingComparator<Map.Entry<K, V>, V> mapEntryValues(
  			Comparator<V> comparator) {
  		return new ConvertingComparator<Map.Entry<K,V>, V>(comparator, new Converter<Map.Entry<K, V>, V>() {
  
  			public V convert(Map.Entry<K, V> source) {
  				return source.getValue();
  			}
  		});
  	}
docs: Create a new {@link ConvertingComparator} that compares {@link java.util.Map.Entry
  map entries} based on their {@link java.util.Map.Entry#getValue() values}.
  
  @param comparator the underlying comparator used to compare values
  @return a new {@link ConvertingComparator} instance