code: def paint(self, p, *args):
      p.setPen(pg.mkPen(200, 200, 200))
      p.drawRect(self.boundingRect())
  
file_path: pyqtgraph/pyqtgraph/examples/GraphicsScene.py
imports: import pyqtgraph
  from pyqtgraph.Qt import QtCore, QtWidgets
label_desc: Use image node_id 2 for calling the Obj obj's underlying member method code with example usage: obj.paint(p) without return types