anchor.diff:  /**
    * Chunked JSON parser that parses [String] chunks.
    */
  -class _JsonStringParser extends _ChunkedJsonParser {
  +class _JsonStringParser extends _ChunkedJsonParser<String> {
     String chunk;
     int chunkEnd;
   
  
positive.code:   }
  
    /** Sets the current source chunk. */
    void set chunk(var source);
  
    /**
     * Length of current chunk.
  
negative.code: /**
   * Chunked JSON parser that parses UTF-8 chunks.
   */
  class _JsonUtf8Parser extends _ChunkedJsonParser<List<int>> {
    final bool allowMalformed;
    List<int> chunk;
    int chunkEnd;
  