private void sendAsync(DistributionMessage msg) {
    if (system != null) {
      system.getDistributionManager().putOutgoing(msg);
    }
  }
Sends a message and does not wait for a response.

<p>
Actually, it's the message implementation that determines if it's sync or async, not this call.
geode-core/src/main/java/org/apache/geode/management/internal/MemberMessenger.java