private String getReferenceToExistingJob(String jobName) {
			for (Map.Entry<JobReference, String> jrEntry : jobReferencesToElementIds.entrySet()) {
				if (jrEntry.getKey().getName().equals(jobName)) {
					return jrEntry.getValue();
				}
			}
			return null;
		}
Visit a job reference. Rules:
<ul>
<li>The flow surrounding element for the step is created if inside a split
</ul>
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/job/dsl/JobSpecification.java