```ruby
require 'facebooker/model'
module Facebooker
  ##
  # A simple representation of a photo album.
  class Album
    include Model
    attr_accessor :aid, :cover_pid, :owner, :name, :created,
                  :modified, :description, :location, :link, :size

  end
end```

Add :visible attr_accessor to Facebooker:Album model
user
```ruby
require 'facebooker/model'
module Facebooker
  ##
  # A simple representation of a photo album.
  class Album
    include Model
    attr_accessor :aid, :cover_pid, :owner, :name, :created,
                  :modified, :description, :location, :link, :size, :visible

  end
end```
assistant