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("copy", self._copy)
          shortcut_manager.add_callback_for_action("paste", self._paste)
          shortcut_manager.add_callback_for_action("cut", self._cut)
          shortcut_manager.add_callback_for_action("undo", self._undo)
          shortcut_manager.add_callback_for_action("redo", self._redo)
          shortcut_manager.add_callback_for_action("apply", self._apply)
          shortcut_manager.add_callback_for_action("open_external_editor", self._open_external_editor)