anchor.diff:        fillColor,
         border,
         enabled,
  -      prefixIcon,
         hashValues(
  +        prefixIcon,
           prefix,
           prefixText,
           prefixStyle,
  
positive.code:         enabledBorder,
          border,
          enabled,
          semanticCounterText,
          alignLabelWithHint,
        ),
      );
    }
  
negative.code: 
    @override
    int get hashCode {
      // Split into several hashValues calls because the hashValues function is
      // limited to 20 parameters.
      return hashValues(
        icon,
  