my-package-view.coffee

module.exports =
class MyPackageView
  atom.deserializers.add(this)

  constructor: (@data) -> #property assigned
  serialize: -> { deserializer: 'MyPackageView', data: @data }
  @deserialize: ({data}) -> new MyPackageView(data)

my-package.coffee

console.log 'Requiring MyPackageView!'
MyPackageView = require './my-package-view'

module.exports =
  view: null
  activate: (state) ->
    @view = new MyPackageView(state ? {hello: 'world'})
    
  deactivate: ->
    
  serialize: ->

package.json

{
  "name": "my-package",
  "main": "./my-package",
  "version": "0.0.0",
  "description": "A short description of your package",
  "activationEvents": ["my-package:toggle"],
  "repository": "https://github.com/atom/my-package",
  "license": "MIT",
  "engines": {
    "atom": ">0.50.0"
  },
  "dependencies": {
  }
}