class_docstr: A DummyVertex is used for edges that span over several layers, it's inserted in every inner layer.
  
  **Attributes**
      - view (viewclass): since a DummyVertex is acting as a Vertex, it must have a view.
      - ctrl (list[_sugiyama_attr]): the list of associated dummy vertices.
docstr: True if a neighbor in the given direction is *dummy*.
docstr_tok: ["True","if","a","neighbor","in","the","given","direction","is","*","dummy","*","."]
code: def inner(self, direction):
      """
      True if a neighbor in the given direction is *dummy*.
      """
      assert direction == +1 or direction == -1
      try:
          return any([x.dummy == 1 for x in self.neighbors(direction)])
      except KeyError:
          return False
      except AttributeError:
          return False
  
file_path: pygraphistry/graphistry/layout/utils/dummyVertex.py
imports: from .rectangle import Rectangle
  from .layoutVertex import LayoutVertex
label_desc: Use image node_id 3 for calling the DummyVertex obj's underlying member method code with example usage: obj.inner(direction) and returns: any, False, False