public void setDefaultBatchTimeout(long defaultBatchTimeout) {
		this.defaultBatchTimeout = defaultBatchTimeout;
	}
Set the default batch timeout - used to send a batch if no messages arrive during this time. Only applies if
batching is enabled and the bus supports this property.
@param defaultBatchTimeout the defaultBatchTimeout to set.
spring-xd-messagebus-spi/src/main/java/org/springframework/xd/dirt/integration/bus/MessageBusSupport.java