code: def __init__(self, layer: Optional[int] = None, is_dummy=0):
      self.layer = layer  # layer number
      self.dummy = is_dummy
      self.root = None
      self.align = None
      self.sink = None
      self.shift = None
      self.X = None
      self.pos = None
      self.x = 0
      self.bar = None
      self.nvs = None
  
imports: from typing import Optional
label_desc: Use image node_id 1 to create a new LayoutVertex object from inherited base classes: object with example: obj = LayoutVertex(layer, is_dummy)