code: def vertices(self, current, previous=None):
      self.previous = current
      return []
  
imports: import re
  import math
  import numpy
  from .None import geometry
  from .geometry import epsilon
  from .transformable import Transformable
label_desc: Use image node_id 2 for calling the Close obj's underlying member method code with example usage: obj.vertices(current, previous) and returns: list