docstr: Update individual button options without replacing the entire
  button definition.
docstr_tok: ["Update","individual","button","options","without","replacing","the","entire","button","definition","."]
code: def setButtonOpts(self, **opts):
      """
      Update individual button options without replacing the entire
      button definition.
      """
      buttonOpts = self.opts.get("button", {}).copy()
      buttonOpts.update(opts)
      self.setOpts(button=buttonOpts)
  
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 3 for calling the ActionGroupParameter obj's underlying member method code with example usage: obj.setButtonOpts() without return types