code: def saveState(self):
      return self.plotItem.saveState()
  
file_path: pyqtgraph/pyqtgraph/widgets/PlotWidget.py
imports: from ..graphicsItems.PlotItem import PlotItem
  from ..Qt import QtCore, QtWidgets
  from .GraphicsView import GraphicsView
label_desc: Use image node_id 6 for calling the PlotWidget obj's underlying member method code with example usage: obj.saveState() and returns: self