public GemFireServerSink json(boolean json) {
		this.json = json;
		return this;
	}
Configure this to use GemFire JSON representation, i.e., create a gemfire-json-server sink.

@param json true if using gemfire-json-server, false for gemfire-server.
@return this
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/GemFireServerSink.java