protected static void becomeLockGrantor(String serviceName) {
    DLockService service = (DLockService) DistributedLockService.getServiceNamed(serviceName);
    assertThat(service).isNotNull();
    System.out.println("About to call becomeLockGrantor...");
    service.becomeLockGrantor();
  }
Connects a DistributedSystem, saves it in static variable "system"
geode-core/src/distributedTest/java/org/apache/geode/distributed/DistributedLockServiceDUnitTest.java