QuiltKey<T>  constructor 
      
      QuiltKey<T> (
    
    
- QuiltTileFaucet<T> feeder,
- List<StaggeredGridTile> tiles
Implementation
QuiltKey(QuiltTileFaucet<T> feeder, List<StaggeredGridTile> tiles)
    : super(sha256
          .convert(utf8.encode(tiles
              .map((t) => t.key)
              .whereType<QuiltTileKey<T>>()
              .map((k) => k.value)
              .join("|")))
          .bytes);