code: public AnalysisJobBuilder getAnalysisJobBuilder(final Object vertex) {
          if (vertex instanceof ComponentBuilder) {
              return ((ComponentBuilder) vertex).getAnalysisJobBuilder();
          }
          return _analysisJobBuilder;
      }
docs: Gets the {@link AnalysisJobBuilder} object pertaining to a particular
  vertex on the {@link JobGraph}.
  
  @param vertex
  @return