class_docstr: Displays a rectangular bar to indicate the relative scale of objects on the view.
class_docstr_tok: ["Displays","a","rectangular","bar","to","indicate","the","relative","scale","of","objects","on","the","view","."]
code: def boundingRect(self):
      return QtCore.QRectF()
  
file_path: pyqtgraph/pyqtgraph/graphicsItems/ScaleBar.py
imports: from ..None import functions
  from ..None import getConfigOption
  from ..Point import Point
  from ..Qt import QtCore, QtWidgets
  from .GraphicsObject import GraphicsObject
  from .GraphicsWidgetAnchor import GraphicsWidgetAnchor
  from .TextItem import TextItem
label_desc: Use image node_id 4 for calling the ScaleBar obj's underlying member method code with example usage: obj.boundingRect() and returns: QtCore