private void clearRegion() {
    LocalRegion region = (LocalRegion) cache.getRegion(SEPARATOR + REGION_NAME);
    assertNotNull(region);
    region.clear();
  }
The test performs following operations 1. Create 2 servers and 3 clients 2. Perform put
operations for known set of keys directy from the server1. 3. Perform destroyRegion operation
from server1 4. verify the result of operation for other clients and other servers.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HAClearDistributedTest.java