class Spaceship::Tunes::BuildTrain

def update_testing_status!(new_value)
  data = client.build_trains(self.application.apple_id)
  data['trains'].each do |train|
    train['testing']['value'] = false
    train['testing']['value'] = new_value if train['versionString'] == version_string
  end
  result = client.update_build_trains!(application.apple_id, data)
  self.testing_enabled = new_value
  result
end