sig
type t =
GoogleAnalytics
| GoogleApps
| GoogleBase
| GoogleSites
| Blogger
| BookSearch
| Calendar
| GoogleCodeSearch
| Contacts
| DocumentsList
| Finance
| Gmail
| Health
| HealthSandbox
| Maps
| Picasa
| Sidewiki
| Spreadsheets
| WebmasterTools
| YouTube
| OtherService of string
val string_of : GapiClientLogin.Service.t -> string
end