public void setDefaultBatchSize(int defaultBatchSize) {
		this.defaultBatchSize = defaultBatchSize;
	}
Set the default batch size; only applies when batching is enabled and the bus supports batching.
@param defaultBatchSize the defaultBatchSize to set.
spring-xd-messagebus-spi/src/main/java/org/springframework/xd/dirt/integration/bus/MessageBusSupport.java