public List<JobReference> getJobReferences() {
		JobReferenceLocator jrl = new JobReferenceLocator();
		jrl.accept(this);
		return jrl.getJobReferences();
	}
A shortcut (avoiding traversing the tree) that returns the list
of all job references somewhere in this AST (references in
transitions do not count).

@return a list of job references in this AST
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/job/dsl/JobSpecification.java