@Test
 public void collectShortWithTarget() {
   ShortHashBag target = new ShortHashBag();
   ShortHashBag result = this.newBag().collectShort(Short::parseShort, target);
   Assert.assertEquals(this.numKeys(), result.sizeDistinct());
   for (int i = 1; i <= this.numKeys(); i++) {
     Assert.assertEquals(i, result.occurrencesOf((short) i));
   }
 }
 @Override
 @Test
 public void collectShort() {
   MutableBag<Integer> integers = UnmodifiableBag.of(HashBag.newBagWith(1, 2, 2, 3, 3, 3));
   Assert.assertEquals(
       ShortHashBag.newBagWith((short) 1, (short) 2, (short) 2, (short) 3, (short) 3, (short) 3),
       integers.collectShort(PrimitiveFunctions.unboxIntegerToShort()));
 }