docs: def register_actions(self, shortcut_manager):
          """Register callback methods for triggered actions
  
          :param rafcon.gui.shortcut_manager.ShortcutManager shortcut_manager: Shortcut Manager Object holding mappings
              between shortcuts and actions.
          """
          shortcut_manager.add_callback_for_action("delete", self._delete_selection)
          shortcut_manager.add_callback_for_action("add", partial(self._add_new_state, state_type=StateType.EXECUTION))
          shortcut_manager.add_callback_for_action("add2", partial(self._add_new_state, state_type=StateType.HIERARCHY))
          shortcut_manager.add_callback_for_action("copy", self.copy_action_callback)
          shortcut_manager.add_callback_for_action("cut", self.cut_action_callback)
          shortcut_manager.add_callback_for_action("paste", self.paste_action_callback)