private void setSystemProperty(String key, String value) {
    System.setProperty(key, value);
  }
Test 1> Site 1 : 1 locator, 1 member 2> Site 2 : 1 locator, 1 member 3> DR is defined on member
1 on site1 4> Serial GatewaySender is defined on member 1 on site1 5> Same DR is defined on
site2 member 1 6> Put is done with value which is PDXSerializable 7> Validate whether other
sites member receive this put operation. 8> Bounce site 1 and delete all of it's data 9> Make
sure that site 1 get the the PDX types along with entries and can deserialize entries.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/misc/PDXNewWanDUnitTest.java