code: def activate(self):
      self.sigActivated.emit(self)
      self.emitStateChanged("activated", None)
  
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 ActionGroupParameter obj's underlying member method code with example usage: obj.activate() without return types