add_contact

Description:

public async bool add_contact (Contact contact, BookOperationFlags opflags, Cancellable? cancellable, out string out_added_uid) throws Error

Adds contact to this.

The call is finished by add_contact.end from the callback.

this	an BookClient
contact	an Contact
opflags	bit-or of BookOperationFlags
cancellable	a Cancellable; can be `null`
callback	callback to call when a result is ready
user_data	user data for the `callback`