class_docstr: Widget implementing a :class:`~pyqtgraph.GraphicsView` with a single
  :class:`~pyqtgraph.MultiPlotItem` inside.
code: def restoreState(self, state):
      pass
  
file_path: pyqtgraph/pyqtgraph/widgets/MultiPlotWidget.py
imports: from ..graphicsItems import MultiPlotItem
  from ..Qt import QtCore
  from .GraphicsView import GraphicsView
label_desc: Use image node_id 6 for calling the MultiPlotWidget obj's underlying member method code with example usage: obj.restoreState(state) without return types