private static Callback<Void> forwardErrorAndTickThreadStages(final Callback<?> callback) {
        Callback<Void> cb = callback.chainStaging((error, result) -> {
            if (error != null)
                callback.onCompletion(error, null);
        });
        return cb;
    }
Execute the given action and subsequent callback immediately if the current thread is the herder's tick thread,
or use them to create and store a {@link DistributedHerderRequest} on the request queue and return the resulting request
if not.
@param action the action that should be run on the herder's tick thread
@param callback the callback that should be invoked once the action is complete
@return a new {@link DistributedHerderRequest} if one has been created and added to the request queue, and {@code null} otherwise
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/distributed/DistributedHerder.java