code: public static void resetCounters() {
  		unionCount = intersectionCount = differenceCount = symmetricDifferenceCount = complementCount = 
  			unionSizeCount = intersectionSizeCount = differenceSizeCount = symmetricDifferenceSizeCount = complementSizeCount = 
  				equalsCount = hashCodeCount = containsAllCount = containsAnyCount = containsAtLeastCount = 0;
  	}
docs: Resets all counters