class_docstr: Indicates that a setting is about to change, allows a listener to cancel the change
  
      
code: def get_cancel_reason(self):
      return self.__cancel_reason
  
imports: from ._change_setting_event import ChangeSettingEvent
label_desc: Use image node_id 4 for calling the BeforeChangeSettingEvent obj's underlying member method code with example usage: obj.get_cancel_reason() and returns: self