public void setDefaultMaxAttempts(int defaultMaxAttempts) {
		this.defaultMaxAttempts = defaultMaxAttempts;
	}
The default maximum delivery attempts for this bus. Can be overridden by consumer property 'maxAttempts' if
supported. Values less than 2 disable retry and one delivery attempt is made.
@param defaultMaxAttempts The default maximum attempts.
spring-xd-messagebus-spi/src/main/java/org/springframework/xd/dirt/integration/bus/MessageBusSupport.java