_ServerToken
int32 _ServerToken() const;
int32 _ServerToken() const;
link.Attach<int32>(bitmap->_ServerToken());
fOwner->fLink->Attach<int32>(image->_ServerToken());
info.bitmapToken = bitmap->_ServerToken();
info.bitmapToken = bitmap->_ServerToken();
info.bitmapToken = bitmap->_ServerToken();
int32 serverToken = bitmap ? bitmap->_ServerToken() : -1;