private static async Task<AddressBookProperties> GetAddressBookProperties (CardDavDataAccess cardDavDataAccess)
{
return
(await cardDavDataAccess.IsAddressBookAccessSupported() ? AddressBookProperties.AddressBookAccessSupported : AddressBookProperties.None) |
(await cardDavDataAccess.IsWriteable() ? AddressBookProperties.IsWriteable : AddressBookProperties.None);
}