private RegionVersionVector<VersionSource<?>> getVersionVector(VM vm) throws Exception {
    byte[] serializedForm = vm.invoke(MultiVMRegionTestCase::getCCRegionVersionVector);
    DataInputStream dis = new DataInputStream(new ByteArrayInputStream(serializedForm));
    return DataSerializer.readObject(dis);
  }
Clear all existing transaction listeners and install the given listener.
geode-dunit/src/main/java/org/apache/geode/cache30/MultiVMRegionTestCase.java