public void activateServiceMode(Player player)
   {
      if(null != player)
      {
         if(playersOnWarmup.containsKey(player.getName()))
         {
            // set player in service mode only, if he has held the items for the full warm-up duration
            playersOnWarmup.remove(player.getName());  
         }

         enableServiceMode(player);
      }
   }