@Override
 public boolean visit(Feature feature) {
   Meeple m = feature.getMeeple();
   if (m == null || m.getPlayer() != player) {
     return true;
   }
   if (m instanceof Builder || m instanceof Pig) {
     toRemove = (Special) m;
     return true;
   }
   if (m instanceof Follower) {
     // another follower exists
     toRemove = null;
     return false;
   }
   return true; // some special case like Barn
 }