enum class GCProtoBufMsgSrc : uint32
{
    GCProtoBufMsgSrc_Unspecified = 0,
    GCProtoBufMsgSrc_FromSystem = 1,
    GCProtoBufMsgSrc_FromSteamID = 2,
    GCProtoBufMsgSrc_FromGC = 3,
    GCProtoBufMsgSrc_ReplySystem = 4,
    GCProtoBufMsgSrc_SpoofedSteamID = 5,
};