class_docstr: Class used to allow GraphicsWidgets to anchor to a specific position on their
  parent. The item will be automatically repositioned if the parent is resized. 
  This is used, for example, to anchor a LegendItem to a corner of its parent 
  PlotItem.
code: def __init__(self):
      self.__parent = None
      self.__parentAnchor = None
      self.__itemAnchor = None
      self.__offset = (0, 0)
      if hasattr(self, "geometryChanged"):
          self.geometryChanged.connect(self.__geometryChanged)
  
imports: from ..Point import Point
label_desc: Use image node_id 1 to create a new GraphicsWidgetAnchor object from inherited base classes: object with example: obj = GraphicsWidgetAnchor()