internal Friend( CMsgClientFSGetFriendsSteamLevelsResponse.Friend friend )
 {
     FriendID = new SteamID( friend.accountid, EUniverse.Public, EAccountType.Individual );
     Level = friend.level;
 }
            internal SteamLevelsCallback( JobID jobID, CMsgClientFSGetFriendsSteamLevelsResponse resp )
            {
                this.JobID = jobID;

                Friends = new ReadOnlyCollection<Friend>( resp.friends.Select( f => new Friend( f ) ).ToList() );
            }