boolean tryLockFailed() {
    if (response == null) {
      return false;
    }
    return response.responseCode == DLockResponseMessage.TRY_LOCK_FAILED;
  }
Provides handling of remote and local lock requests. <br>
A lock client sends a <code>DLockRequestMessage</code> to the lock grantor and then blocks,
waiting for the reply. <br>
When the lock grantor grants or times out the request, a <code>DLockResponseMessage</code> is
finally sent back to the waiting client.
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockRequestProcessor.java