synchronized void assertCount(int expectedCreate, int expectedUpdate,
        int expectedInvalidate, int expectedDestroy) {
      assertThat(aCreateCalls).isEqualTo(expectedCreate);
      assertThat(aUpdateCalls).isEqualTo(expectedUpdate);
      assertThat(aInvalidateCalls).isEqualTo(expectedInvalidate);
      assertThat(aDestroyCalls).isEqualTo(expectedDestroy);
      assertThat(regionOps).isEqualTo(0);
    }
An <code>LongWrapper</code> that is <code>DataSerializable</code>.
geode-dunit/src/main/java/org/apache/geode/cache30/MultiVMRegionTestCase.java