code: def vertices(self, current, previous=None):
      ox, oy = self.origin(current)
      y = self._args[0]
      self.previous = ox, oy + y
  
      return ((ox, oy + y),)
  
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 VLine obj's underlying member method code with example usage: obj.vertices(current, previous) and returns: ox,  unknown