class_docstr: Wraps a :class:`GroupParameterItem` to manage function parameters created by
  an interactor. Provies a button widget which mimics an ``action`` parameter.
class_docstr_tok: ["Wraps","a",":","class",":","`","GroupParameterItem","`","to","manage","function","parameters","created","by","an","interactor",".","Provies","a","button","widget","which","mimics","an","``","action","``","parameter","."]
code: def treeWidgetChanged(self):
      ParameterItem.treeWidgetChanged(self)
      tw = self.treeWidget()
      if tw is None:
          return
      tw.setItemWidget(self, 1, self.itemWidget)
  
file_path: pyqtgraph/pyqtgraph/parametertree/parameterTypes/actiongroup.py
imports: import warnings
  from ...Qt import QtCore
  from .action import ParameterControlledButton
  from .basetypes import GroupParameter, GroupParameterItem
  from ..ParameterItem import ParameterItem
  from ...Qt import QtCore, QtWidgets
label_desc: Use image node_id 2 for calling the ActionGroupParameterItem obj's underlying member method code with example usage: obj.treeWidgetChanged() without return types