/// <summary>
    /// Determines whether the group training is finished.
    /// </summary>
    /// <returns><c>true</c> if the group training is finished; otherwise, <c>false</c>.</returns>
    public bool IsGroupTrained()
    {
        // create the user-group if needed
        if (userGroupId != initedGroupId)
        {
            GetOrGreateUserGroup();
        }
        if (userGroupId != initedGroupId)
        {
            return(false);
        }

        if (faceManager != null)
        {
            return(faceManager.IsPersonGroupTrained(userGroupId));
        }

        return(false);
    }