case TrackChain::UNSPECIFIED: conv.result("UNSPECIFIED"); return;
case TrackChain::UP: conv.result("UP"); return;
case TrackChain::DOWN: conv.result("DOWN"); return;
case TrackChain::UNSPECIFIED: conv.result("UNSPECIFIED"); return;
case TrackChain::UP: conv.result("UP"); return;
case TrackChain::DOWN: conv.result("DOWN"); return;