anchor.diff:  
   import 'package:chrome_gen/src/common_exp.dart';
   
  +/**
  + * Encapsulates the result returned by js zlib library.
  + */
   class ZlibResult {
   
     ArrayBuffer buffer;
  
positive.code:   }
  }
  
  class Zlib {
  
    static ZlibResult inflate(Uint8List data, int expectedLength) {
  
      Map<String, int> options = new Map<String, int>();
  
negative.code:     return result;
    }
  
    /**
     * Deflates a byte stream.
     *
     */
    static ZlibResult deflate(Uint8List data) {
  
      js.JsObject deflate = new js.JsObject(js.context['Zlib']['Deflate'],
  