code: def to_CAG_agraph(self):
          
          CAG = self.to_CAG()
          A = nx.nx_agraph.to_agraph(CAG)
          A.graph_attr.update({"dpi": 227, "fontsize": 20, "fontname": "Menlo"})
          A.node_attr.update(
              {
                  "shape": "rectangle",
                  "color": "#650021",
                  "style": "rounded",
                  "fontname": "Gill Sans",
              }
          )
          A.edge_attr.update({"color": "#650021", "arrowsize": 0.5})
          return A
docs: Returns a variable-only view of the GrFN in the form of an AGraph.
  
          Returns:
              type: A CAG constructed via variable influence in the GrFN object.