bool GameObject::isVisibleForInState(Player const* u, bool inVisibleList) const
{
    // Not in world
    if (!IsInWorld() || !u->IsInWorld())
        return false;

    // Transport always visible at this step implementation
    if (IsTransport() && IsInMap(u))
        return true;

    // quick check visibility false cases for non-GM-mode
    if (!u->isGameMaster())
    {
        // despawned and then not visible for non-GM in GM-mode
        if (!isSpawned())
            return false;

        // special invisibility cases
        if (GetGOInfo()->type == GAMEOBJECT_TYPE_TRAP && GetGOInfo()->trap.stealthed)
        {
            Unit *owner = GetOwner();
            if (owner && u->IsHostileTo(owner) && !canDetectTrap(u, GetDistance(u)))
                return false;
        }

        // Smuggled Mana Cell required 10 invisibility type detection/state
        if (GetEntry() == 187039 && ((u->m_detectInvisibilityMask | u->m_invisibilityMask) & (1<<10)) == 0)
            return false;
    }

bool GameObject::IsNeverVisible() const
{
    if (WorldObject::IsNeverVisible())
        return true;

    if (GetGoType() == GAMEOBJECT_TYPE_SPELL_FOCUS && GetGOInfo()->spellFocus.serverOnly == 1)
        return true;   

    return false;
}

Map* map = go->GetMap();
            Map::PlayerList const &PlayerList = map->GetPlayers();
            if (!PlayerList.isEmpty())
            {
                   for (Map::PlayerList::const_iterator i = PlayerList.begin(); i != PlayerList.end(); ++i)
                   {
                          if (((i->getSource()))->IsInRange((go),0,200))
                          {
            if(i->getSource()->HaseAura(ID))
                go->IsNeverVisible();
            else
                видим;
        }
    }
}

Player *targ = go>FindNearestPlayer(80.0f, true);
     if(i->getSource()->HaseAura(ID))
                go->IsNeverVisible();
            else
                видим;