@AssertFalse(message = "'cron', explicit 'date' and 'fixedDelay' are mutually exclusive")
	private boolean isInvalid() {
		return Exclusives.strictlyMoreThanOne(fixedDelay != null, cron != null, !DEFAULT_DATE.equals(date));
	}
Describes options to the {@code trigger} source module.

@author Eric Bottard
@author Florent Biville
@author Gary Russell
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/modules/metadata/TriggerSourceOptionsMetadata.java