code: def childStretchChanged(self):
      # print "child", QtCore.QObject.sender(self), "changed shape, updating", self
      self.updateStretch()
  
imports: import weakref
  from ..Qt import QtCore, QtWidgets
  from .Dock import Dock
label_desc: Use image node_id 9 for calling the Container obj's underlying member method code with example usage: obj.childStretchChanged() without return types