How to use the ltk.utils.restart function in ltk

self.add_document(file_path, title, locale=self.locale)

                        elif self.doc_manager.is_doc_modified(relative_path, self.path):
                            self.update_content(relative_path)
                        else:
                            return
                    except KeyboardInterrupt:
                        for observer in self.observers:
                            observer.stop()
                    except ConnectionError:
                        print("Could not connect to remote server.")
                        restart()
                    except ValueError:
                        print(sys.exc_info()[1])
                        restart()
                    doc = self.doc_manager.get_doc_by_prop('file_name', relative_path)
                    if doc:
                        document_id = doc['id']
                    else:
                        return
                    if self.locale_delimiter:
                        try:
                            # curr_locale = title.split(self.locale_delimiter)[1]
                            # todo locale detection needs to be more robust
                            curr_locale = title.split(self.locale_delimiter)[-2]
                            fixed_locale = map_locale(curr_locale)
                            if fixed_locale:
                                print ("fixed locale: ", fixed_locale)
                                # self.watch_locales.add(fixed_locale)
                                self.detected_locales[document_id] = fixed_locale
                            else:

#testing
                            #self.polled_list.add(relative_path) #test that this doesn't break other areas of watch
                            #end testing

                            self.add_document(file_path, title, locale=self.locale)

                        elif self.doc_manager.is_doc_modified(relative_path, self.path):
                            self.update_content(relative_path)
                        else:
                            return
                    except KeyboardInterrupt:
                        for observer in self.observers:
                            observer.stop()
                    except ConnectionError:
                        print("Could not connect to remote server.")
                        restart()
                    except ValueError:
                        print(sys.exc_info()[1])
                        restart()
                    doc = self.doc_manager.get_doc_by_prop('file_name', relative_path)
                    if doc:
                        document_id = doc['id']
                    else:
                        return
                    if self.locale_delimiter:
                        try:
                            # curr_locale = title.split(self.locale_delimiter)[1]
                            # todo locale detection needs to be more robust
                            curr_locale = title.split(self.locale_delimiter)[-2]
                            fixed_locale = map_locale(curr_locale)
                            if fixed_locale:
                                print ("fixed locale: ", fixed_locale)

def handleError(self):
        if self.watch:
            logger.warning("Could not connect to Lingotek")
            restart("Restarting watch", self.timeout)
        else:
            raise ConnectionFailed("Could not connect to Lingotek")

#self.update_document_action(os.path.join(self.path, fn))
                        #logger.info('Updating remote content: {0}'.format(fn))
                        try:
                            self.polled_list.remove(fn)
                        except Exception:
                            pass
                        self.update_content(fn)
                except KeyboardInterrupt:
                    for observer in self.observers:
                        observer.stop()
                except ConnectionError:
                    print("Could not connect to remote server.")
                    restart()
                except ValueError:
                    print(sys.exc_info()[1])
                    restart()
        except KeyboardInterrupt:
            for observer in self.observers:
                observer.stop()
        except Exception as err:
            restart("Error on modified: "+str(err)+"\nRestarting watch.")

def handleError(self):
        if self.watch:
            logger.warning("Could not connect to Lingotek")
            restart("Restarting watch", self.timeout)
        else:
            raise ConnectionFailed("Could not connect to Lingotek")

def handleError(self):
        if self.watch:
            logger.warning("Could not connect to Lingotek")
            restart("Restarting watch", self.timeout)
        else:
            raise ConnectionFailed("Could not connect to Lingotek")