code: def updateGraph(self):
      pg.GraphItem.setData(self, **self.data)
      for i, item in enumerate(self.textItems):
          item.setPos(*self.data["pos"][i])
  
file_path: pyqtgraph/pyqtgraph/examples/CustomGraphItem.py
imports: import numpy
  import pyqtgraph
  from pyqtgraph.Qt import QtCore
label_desc: Use image node_id 4 for calling the Graph obj's underlying member method code with example usage: obj.updateGraph() without return types