public ObservableRepositoryInvitationsClient(IGitHubClient client)
        {
            Ensure.ArgumentNotNull(client, "client");

            _client     = client.Repository.Invitation;
            _connection = client.Connection;
        }
        public ObservableRepositoryInvitationsClient(IGitHubClient client)
        {
            Ensure.ArgumentNotNull(client, "client");

            _client = client.Repository.Invitation;
            _connection = client.Connection;
        }