@Override
  public String toString() {
    return '<' + "DLockGrantor" + "@"
        + Integer.toHexString(System.identityHashCode(this)) + " state="
        + stateToString(state) + " name=" + dlock.getName()
        + " version=" + getVersionId() + '>';
  }
Waits uninterruptibly until this service is destroyed. Returns when grantor has been completely
destroyed.

@throws DistributedSystemDisconnectedException if system shuts down before grantor is destroyed
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockGrantor.java