code: def _get_go2pydotnode(self):
          
          go2node = {}
          for goid, goobj in self.godag.go2obj.items():
              txt = self._get_node_text(goid, goobj)
              fillcolor = self.goid2color.get(goid, "white")
              node = self.pydot.Node(
                  txt,
                  shape="box",
                  style="rounded, filled",
                  fillcolor=fillcolor,
                  color="mediumseagreen")
              go2node[goid] = node
          return go2node
docs: Create pydot Nodes.