}
        };
    ListMultimap<String, String> transformed = Multimaps.transformEntries(multimap, transformer);
    assertEquals(ImmutableListMultimap.of("a", "a1", "a", "a4", "a", "a4", "b", "b6"), transformed);
    assertEquals("{a=[a1, a4, a4], b=[b6]}", transformed.toString());
  }

  public void testSynchronizedMultimapSampleCodeCompilation() {

          }
        };
    ListMultimap<String, String> transformed = Multimaps.transformEntries(multimap, transformer);
    assertEquals(ImmutableListMultimap.of("a", "a1", "a", "a4", "a", "a4", "b", "b6"), transformed);
    assertEquals("{a=[a1, a4, a4], b=[b6]}", transformed.toString());
  }

  public void testSynchronizedMultimapSampleCodeCompilation() {