@Override
  public final void preTearDown() throws Exception {
    // close the clients first
    closeCache();
    // then close the servers
    server1.invoke(DurableResponseMatrixDUnitTest::closeCache);
  }
Tests that the Matris defined in <code>ServerResponseMatrix</code> is applied or not

@since GemFire 5.1
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/DurableResponseMatrixDUnitTest.java