@Test
 public void collectFloat() {
   ImmutableCollection<Integer> integers = this.classUnderTest();
   ImmutableFloatCollection immutableCollection =
       integers.collectFloat(PrimitiveFunctions.unboxIntegerToFloat());
   Verify.assertSize(integers.size(), immutableCollection);
   Assert.assertEquals(
       integers,
       immutableCollection.collect(floatParameter -> Integer.valueOf((int) floatParameter)));
 }