Google Calendar API: GDataEntryCalendarEvent question

I'm trying to use the google GData api to insert an event in 开发者_如何转开发a google calendar. My question is this: I don't see anywhere in the header files for GDataEntryCalendarEvent the ability to add guests to an event?

Anyone know how to do that?

---

If you look in GDataEntryEvent there are some methods to add participants.