code: function dereference (parser, options) {
    // console.log('Dereferencing $ref pointers in %s', parser.$refs._root$Ref.path);
    var dereferenced = crawl(parser.schema, parser.$refs._root$Ref.path, "#", [], parser.$refs, options);
    parser.$refs.circular = dereferenced.circular;
    parser.schema = dereferenced.value;
  }
docs: Crawls the JSON schema, finds all JSON references, and dereferences them.
  This method mutates the JSON schema object, replacing JSON references with their resolved value.
  
  @param {$RefParser} parser
  @param {$RefParserOptions} options