code: public Iterator<?> downstreamProjects() {
          List<Run<?, ?>> downstreamList = new ArrayList<Run<?, ?>>();
  
          downstreamList.add(build);
  
          return downstreamList.iterator();
      }
docs: Return a downstream iterator of a build of default type. This will be overriden by specific build types.
  <p>
  If the receiver of the call has no child projects, it will return an iterator over itself
  
  @return the downstream builds as an iterator