old_contents: import RavenLogger from 'meteor/flowkey:raven';
  import { Meteor } from 'meteor/meteor';
  
  const ravenOptions = {};
  
  export const ravenLogger = new RavenLogger({
    publicDSN: Meteor.settings.public.sentryPublicDSN,
    shouldCatchConsoleError: true, // default true
    trackUser: true, // default false
  }, ravenOptions);
  
new_contents: import RavenLogger from 'meteor/flowkey:raven';
  import { Meteor } from 'meteor/meteor';
  
  const ravenOptions = {};
  
  const enabled = Meteor.settings.public.sentryPublicDSN && Meteor.settings.public.sentryPublicDSN.length > 0;
  
  export const ravenLogger = enabled ? new RavenLogger({
    publicDSN: Meteor.settings.public.sentryPublicDSN,
    shouldCatchConsoleError: true, // default true
    trackUser: true, // default false
  }, ravenOptions) : { log: (error) => { console.log(error); } };
  
subject: Make raven use optional