@Override
    public List<Integer> getDestinationsToPublish(Object payload, DynamicOptions transportOptions) {
        return activeDestinationIds;
    }
This method tells the ID(s) of the destination(s) to which a given messages should be sent. There can be cases
where a given message is only sent to a specific destination(e.g., partition based) and message is sent to
multiple endpoints(e.g., broadcast)

@param payload          payload of the message
@param transportOptions Dynamic transport options of the sink
@return Set of IDs of the destination to which the event should be sent
modules/siddhi-core/src/main/java/io/siddhi/core/stream/output/sink/distributed/BroadcastDistributionStrategy.java