code: Tupple2<MeshTile, Poly> getTileAndPolyByRefUnsafe(long ref) {
          int[] saltitip = decodePolyId(ref);
          int it = saltitip[1];
          int ip = saltitip[2];
          return new Tupple2<>(m_tiles[it], m_tiles[it].data.polys[ip]);
      }
docs: / it does not validate the reference.