public RemoteThread getRemoteThread() {
      synchronized (rThreadLock) {
        if (rThread == null) {
          // grantor will need RemoteThread to process this request...
          rThread = new RemoteThread(getSender(), getThreadId());
        }
        return rThread;
      }
    }
True if we've responded to this request
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockRequestProcessor.java