@Override
	boolean isFlow() {
		return true;
	}
The AST node representing a flow. A flow is a series of jobs to execute sequentially. Those jobs
can themselves be individual jobs or splits. In DSL form a flow is expressed like this:
<pre><tt>aa || bb</tt></pre>.

@author Andy Clement
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/job/dsl/Flow.java