Need towerjs "Mailers" working example

I reed Tower.js doc and totally cant see - how I may get worked mailer?

Mailers section said:

class App.Notification extends Tower.Mailer
  # app/views/mailers/welcome.coffee template
  @welcome: (user) ->
    @mail to: user.email, from: "me@gmail.com"

but example do not marked where this code need to be placed.

Please appoint me.

I believe the mailer should go in app/mailers, based on the generator for mailers:

class Tower.Generator.MailerGenerator extends Tower.Generator
  sourceRoot: __dirname

  run: ->
    @inside "app", '.', ->
      @inside "mailers", '.', ->
        @template "mailer.coffee", "#{@model.name}Mailer.coffee", ->

module.exports = Tower.Generator.MailerGenerator