public List<JobDefinition> getJobDefinitions() {
		if (jobDefinitions != null) {
			return jobDefinitions;
		}
		JobDefinitionLocator jdl = new JobDefinitionLocator();
		jdl.accept(this);
		jobDefinitions = jdl.getJobDefinitions();
		return jobDefinitions;
	}
A shortcut (avoiding traversing the tree) that returns the list
of all job definitions inlined somewhere in this AST. Computed
on demand.

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