private InternalDistributedMember getElderId() {
    InternalDistributedMember elder = dm.getElderId();
    if (elder == null) {
      dm.getSystem().getCancelCriterion().checkCancelInProgress(null);
    }
    Assert.assertTrue(elder != null);
    return elder;
  }
Returns true if lockGrantorId is the same as the specified LockGrantorId. Caller must
synchronize on lockGrantorIdLock.

@param someLockGrantorId the LockGrantorId to check
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockService.java