class_docstr: The classic Sugiyama layout aka layered layout.
  
  - See https://en.wikipedia.org/wiki/Layered_graph_drawing
  - Excellent explanation: https://www.youtube.com/watch?v=Z0RGCWxvCxA
  
  
  **Attributes**
      - dirvh (int): the current aligment state for alignment policy:
               dirvh=0 -> dirh=+1, dirv=-1: leftmost upper
               dirvh=1 -> dirh=-1, dirv=-1: rightmost upper
               dirvh=2 -> dirh=+1, dirv=+1: leftmost lower
               dirvh=3 -> dirh=-1, dirv=+1: rightmost lower
      - order_iter (int): the default number of layer placement iterations
      - order_attr (str): set attribute name used for layer ordering
      - xspace (int): horizontal space between vertices in a layer
      - yspace (int): vertical space between layers
      - dw (int): default width of a vertex
      - dh (int): default height of a vertex
      - g (GraphBase): the graph component reference
      - layers (list[sugiyama.layer.Layer]): the list of layers
      - layoutVertices (dict): associate vertex (possibly dummy) with their sugiyama attributes
      - ctrls (dict): associate edge with all its vertices (including dummies)
      - dag (bool): the current acyclic state
      - init_done (bool): True if things were initialized
  
  **Example**
  
      ::
  
          g = nx.generators.connected_watts_strogatz_graph(1000, 2, 0.3)
          # render
          SugiyamaLayout.draw(g)
          # positions
          positions_dictionary = SugiyamaLayout.arrange(g)
docstr: Inverts the edges from the `inverted_edges` set.
  Usually this method is called before and after some change to ensure that the cycles don't create issues.
docstr_tok: ["Inverts","the","edges","from","the","`","inverted_edges","`","set",".","Usually","this","method","is","called","before","and","after","some","change","to","ensure","that","the","cycles","do","n't","create","issues","."]
code: def _edge_inverter(self):
      """
      Inverts the edges from the `inverted_edges` set.
      Usually this method is called before and after some change to ensure that the cycles don't create issues.
      """
      for e in self.inverted_edges:
          x, y = e.v
          e.v = (y, x)
      self.dag = not self.dag
      if self.dag:
          for e in self.g.loops:
              e.detach()
              self.g.edgesPoset.remove(e)
      else:
          for e in self.g.loops:
              self.g.add_edge(e)
  
imports: import pandas, typing
  from sys import getrecursionlimit, setrecursionlimit
  from graphistry.layout.graph import Vertex, GraphBase, Graph, Edge
  from graphistry.layout.utils import DummyVertex, LayoutVertex, Rectangle, size_median
  from graphistry.layout.utils.layer import Layer
label_desc: Use image node_id 15 for calling the SugiyamaLayout obj's underlying member method code with example usage: obj._edge_inverter() without return types