public List<CapturedPunctuator> scheduledPunctuators() {
        return new LinkedList<>(punctuators);
    }
Get the punctuators scheduled so far. The returned list is not affected by subsequent calls to {@code schedule(...)}.

@return A list of captured punctuators.
streams/test-utils/src/main/java/org/apache/kafka/streams/processor/api/MockProcessorContext.java