code: @Override
      public Iterator<?> downstreamProjects() {
          FlowRun flowRun = (FlowRun) build;
  
          DirectedGraph<JobInvocation, FlowRun.JobEdge> directedGraph = flowRun.getJobsGraph();
  
          return directedGraph.vertexSet().iterator();
      }
docs: Return a downstream iterator of a build of default type. This will be overriden by specific build types.
  
  @return the downstream builds as an iterator