/** * Lists all labels in the user's mailbox * @see https://developers.google.com/gmail/api/reference/rest/v1/users.labels/list */functionlistLabels(){try{// Gmail.Users.Labels.list() API returns the list of all Labels in user's mailboxconstresponse=Gmail.Users.Labels.list('me');if(!response||response.labels.length===0){// TODO (developer) - No labels are returned from the responseconsole.log('Nolabelsfound.');return;}// Print the Labels that are available.console.log('Labels:');for(constlabelofresponse.labels){console.log('-%s',label.name);}}catch(err){// TODO (developer) - Handle exception on Labels.list() APIconsole.log('Labels.list()APIfailedwitherror%s',err.toString());}}