boolean isDestroyed(final Region region) {
      return region == null || region.isDestroyed();
    }
Test Region expiration - both time-to-live and idle timeout.

<p>
Note: See LocalRegionTest and MultiVMRegionTestCase for more expiration tests.

<p>
Single-JVM tests were extracted to RegionExpirationIntegrationTest.

@since GemFire 3.0
geode-core/src/distributedTest/java/org/apache/geode/cache/RegionExpirationDistributedTest.java