@ModuleOption("an optional SpEL expression referencing the event")
	public void setCacheEventExpression(String cacheEventExpression) {
		this.cacheEventExpression = cacheEventExpression;
	}
Describes options to the {@code gemfire} source module.

@author Eric Bottard
@author David Turanski
extensions/spring-xd-extension-gemfire/src/main/java/org/springframework/xd/gemfire/GemfireSourceOptionsMetadata.java