@Min(0)
	public int getInitialDelay() {
		return initialDelay;
	}
Mixin for options that include a periodic fixed-delay trigger.
fixedDelay remains in annotated classes to avoid breaking changes
due to differing defaults.

@author Gary Russell
spring-xd-module-spi/src/main/java/org/springframework/xd/module/options/mixins/PeriodicTriggerMixin.java