lambda

src/main/java/com/zipcoder/payment/PaymentPresenter.java

 package com.zipcoder.payment;
 
 import java.util.Arrays;
+import java.util.Comparator;
 
 public class PaymentPresenter {
 
     public String toString(Payment[] payments) {
+        //Comparator<Payment> shortDescComp = (p1, p2) -> p1.getShortDescription().compareTo(p2.getShortDescription());
         Arrays.sort(payments, new PaymentSortByShortDescription());
         return createArrayString(payments);
     }