public void setReturnEvents(ComplexEventChunk complexEventChunk) {
            if (this.complexEventChunk == null) {
                this.complexEventChunk = new ComplexEventChunk();
            }
            this.complexEventChunk.add(complexEventChunk.getFirst());
        }
Class to hold the events which are differed publishing
modules/siddhi-core/src/main/java/io/siddhi/core/query/input/MultiProcessStreamReceiver.java