anchor.diff:     *
      * Only used by [fail] to include the chunk in the thrown [FormatException].
      */
  -  get chunk;
  +  T get chunk;
   
     /**
      * Get charcacter/code unit of current chunk.
  
positive.code:  *
   * Implementations include [String] and UTF-8 parsers.
   */
  abstract class _ChunkedJsonParser {
    // A simple non-recursive state-based parser for JSON.
    //
    // Literal values accepted in states ARRAY_EMPTY, ARRAY_COMMA, OBJECT_COLON
  
negative.code: /**
   * Chunked JSON parser that parses [String] chunks.
   */
  class _JsonStringParser extends _ChunkedJsonParser<String> {
    String chunk;
    int chunkEnd;
  
  