if (Meteor.isServer) return

function Example() { this.directHello = "Hello World by field" }

Object.defineProperty(Example.prototype, 'hello', {
  value: "Hello World by prototype"
})

Router.map(function() {
  this.route('index', {path: '/', data: function() { return new Example }})
})

Template.index.helperHello = function() { return (new Example).hello }