}

  @Test
  public void testRemoveEqualKeyWithDifferentReference() {
    String fooReference1 = new String("foo");
    String fooReference2 = new String("foo");
    assertThat(fooReference1).isNotSameInstanceAs(fooReference2);

    assertThat(mapCache.put(fooReference1, "bar")).isNull();
    assertThat(mapCache.get(fooReference1)).isEqualTo("bar"); // ensure first reference is cached

          }
        };

    Class<?> finalizerCopy = decoupledLoader.loadFinalizer();

    assertThat(finalizerCopy).isNotNull();
    assertThat(finalizerCopy).isNotSameInstanceAs(Finalizer.class);

    assertThat(FinalizableReferenceQueue.getStartFinalizer(finalizerCopy)).isNotNull();
  }

  static class DecoupledClassLoader extends URLClassLoader {

          }
        };

    Class<?> finalizerCopy = decoupledLoader.loadFinalizer();

    assertThat(finalizerCopy).isNotNull();
    assertThat(finalizerCopy).isNotSameInstanceAs(Finalizer.class);

    assertThat(FinalizableReferenceQueue.getStartFinalizer(finalizerCopy)).isNotNull();
  }

  static class DecoupledClassLoader extends URLClassLoader {