code: def restoreState(self, state):
      return self.plotItem.restoreState(state)
  
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 7 for calling the PlotWidget obj's underlying member method code with example usage: obj.restoreState(state) and returns: self