@Override
		public Object walk(Object context, Split pjs) {
			for (JobNode jobNode : pjs.getSeries()) {
				walk(context, jobNode);
			}
			return context;
		}
Basic visitor that simply collects up any job references (*not* those named in transitions)
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/job/dsl/JobSpecification.java