cancel Scheduled Message Async(long sequenceNumber)
Cancels the enqueuing of an already sent scheduled message, if it was not already enqueued. This is an asynchronous method returning a CompletableFuture which completes when the message is cancelled.
public CompletableFuture<Void> cancelScheduledMessageAsync(long sequenceNumber)
sequence number of the scheduled message
a CompletableFuture representing the pending cancellation