code: def boundingRect(self):
      return QtCore.QRectF(0, 0, 20, 20)
  
file_path: pyqtgraph/pyqtgraph/examples/GraphicsScene.py
imports: import pyqtgraph
  from pyqtgraph.Qt import QtCore, QtWidgets
label_desc: Use image node_id 3 for calling the Obj obj's underlying member method code with example usage: obj.boundingRect() and returns: QtCore