code: def get_graphviz_dirtree(self, engine="automatic", **kwargs):
          
          if engine == "automatic":
              engine = "fdp"
  
          return Dirviz(self.workdir).get_cluster_graph(engine=engine, **kwargs)
docs: Generate directory graph in the DOT language. The graph show the files and directories
          in the node workdir.
  
          Returns: graphviz.Digraph <https://graphviz.readthedocs.io/en/stable/api.html#digraph>