code: def viewRangeChanged(self, view, range):
      # self.emit(QtCore.SIGNAL('viewChanged'), *args)
      self.sigRangeChanged.emit(self, range)
  
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 4 for calling the PlotWidget obj's underlying member method code with example usage: obj.viewRangeChanged(view, range) without return types