class_docstr: jupyter_rfb analogue of
  :class:`PlotWidget <pyqtgraph.PlotWidget>`.
code: def getPlotItem(self):
      return self.plotItem
  
imports: import jupyter_rfb
  import numpy
  from ..None import functions
  from ..None import graphicsItems, widgets
  from ..Qt import QtCore, QtGui
label_desc: Use image node_id 2 for calling the PlotWidget obj's underlying member method code with example usage: obj.getPlotItem() and returns: self