code: public static DifferenceEvaluator
          chain(final DifferenceEvaluator... evaluators) {
          return new DifferenceEvaluator() {
              @Override
              public ComparisonResult evaluate(Comparison comparison, ComparisonResult orig) {
                  ComparisonResult finalResult = orig;
                  for (DifferenceEvaluator ev : evaluators) {
                      ComparisonResult evaluated = ev.evaluate(comparison, finalResult);
                      finalResult = evaluated;
                  }
                  return finalResult;
              }
          };
      }
docs: Combines multiple DifferenceEvaluators so that the result of the
  first Evaluator will be passed to the next Evaluator.