```ruby
module PageModels
  module RegistrationSuccessAsserts

    def assert_welcome_message
      expect(registration_success_page.welcome_label).to have_content(test_data('messages', 'welcome'), :visible => true)
    end

  end
end
World(PageModels::RegistrationSuccess)```

Fix error in world calling.
user
```ruby
module PageModels
  module RegistrationSuccessAsserts

    def assert_welcome_message
      expect(registration_success_page.welcome_label).to have_content(test_data('messages', 'welcome'), :visible => true)
    end

  end
end
World(PageModels::RegistrationSuccessAsserts)```
assistant