@ModuleOption("the message that will be sent when the trigger fires")
	public void setPayload(String payload) {
		this.payload = payload;
	}
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