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("add", partial(self._add_new_state, state_type=StateType.EXECUTION))
          shortcut_manager.add_callback_for_action("add_execution_state", partial(self._add_new_state,
                                                                                  state_type=StateType.EXECUTION))
          shortcut_manager.add_callback_for_action("add_hierarchy_state", partial(self._add_new_state,
                                                                                  state_type=StateType.HIERARCHY))
          shortcut_manager.add_callback_for_action("add_barrier_state", partial(self._add_new_state,
                                                                                state_type=StateType.BARRIER_CONCURRENCY))
          shortcut_manager.add_callback_for_action("add_preemptive_state", partial(self._add_new_state,
                                                                                   state_type=StateType.PREEMPTION_CONCURRENCY))
  
          shortcut_manager.add_callback_for_action("add_output", partial(self._add_data_port_to_selected_state,
                                                                         data_port_type='OUTPUT'))
          shortcut_manager.add_callback_for_action("add_input", partial(self._add_data_port_to_selected_state,
                                                                        data_port_type='INPUT'))
          shortcut_manager.add_callback_for_action("add_scoped_variable", self._add_scoped_variable_to_selected_state)
          shortcut_manager.add_callback_for_action("add_outcome", self._add_outcome_to_selected_state)
  
          shortcut_manager.add_callback_for_action("delete", self._remove_selected_elements)
  
          shortcut_manager.add_callback_for_action("copy", self._copy_selection)
          shortcut_manager.add_callback_for_action("paste", self._paste_clipboard)
          shortcut_manager.add_callback_for_action("cut", self._cut_selection)
  
          shortcut_manager.add_callback_for_action('show_data_flows', self.update_view)
          shortcut_manager.add_callback_for_action('show_data_values', self.update_view)
          shortcut_manager.add_callback_for_action('data_flow_mode', self.data_flow_mode)
          shortcut_manager.add_callback_for_action('show_aborted_preempted', self.update_view)