anchor.diff:  
     // QUESTION: When exporting a key as JWK (JSON Web Key) ww get JSON, should
     //           we return String, Uint8List, or Map<String, Object> ?
  +  //           Or is this Map<String, dynamic>?
     //           Similarly, we have method that import from JSON Web Keys.
   }
   
  
positive.code: // QUESTION: Should these Hasher implementations be `const` or `final`?
  // QUESTION: Should these Hasher implementation be top-level elements or static
  //           properties on the `Hasher` class?
  
  /// Key for signing/verifying with HMAC.
  ///
  
negative.code:   //           identity on all platforms? HmacSecretKey can only accept the
    //           implementations defined in this library. When passing to webcryto
    //           we must pass as a string.
    //           See: https://dart.dev/guides/language/effective-dart/design#avoid-defining-a-one-member-abstract-class-when-a-simple-function-will-do
  
    /// Compute a cryptographic hash-sum of [data] stream using this [Hasher].
    ///
  