anchor.diff:    }
   
     _parseSharedStrings() {
  -    var sharedStrings = _archive.findFile('xl/sharedStrings.xml');
  +    var sharedStrings = _archive.findFile('xl/$_sharedStringsTarget');
       if (sharedStrings != null) {
         sharedStrings.decompress();
         var document = parse(UTF8.decode(sharedStrings.content));
  
positive.code: 
    _parseTable(XmlElement node) {
      var name = node.getAttribute('name');
      var id = node.getAttribute('r:id').substring(3,4);
      tables[name] = new SpreadsheetTable();
      var table = tables[name];
  
      var sheet = _archive.findFile('xl/worksheets/sheet$id.xml');
      sheet.decompress();
  
      var document = parse(UTF8.decode(sheet.content));
  
negative.code: class XlsxDecoder extends SpreadsheetDecoder {
    List<String> _sharedStrings = new List<String>();
    List<int> _numFormats = new List<int>();
    String _stylesTarget;
    String _sharedStringsTarget;
    Map<String,String> _worksheetTargets = new Map<String,String>();
  
    XlsxDecoder(Archive archive) {
      this._archive = archive;
      _tables = new Map<String, SpreadsheetTable>();
      _parseRelations();
      _parseStyles();
      _parseSharedStrings();
      _parseContent();
    }
  
    _parseRelations() {
      var relations = _archive.findFile('xl/_rels/workbook.xml.rels');
      if (relations != null) {
        relations.decompress();
        var document = parse(UTF8.decode(relations.content));
        document.findAllElements('Relationship').forEach((node) {
          switch (node.getAttribute('Type')) {
            case _relationshipsStyles:
              _stylesTarget = node.getAttribute('Target');
              break;
            case _relationshipsWorksheet:
              _worksheetTargets[node.getAttribute('Id')] = node.getAttribute('Target');
              break;
            case _relationshipsSharedStrings:
              _sharedStringsTarget = node.getAttribute('Target');
              break;
          }
        });
      }
    }
  
    _parseStyles() {
      var styles = _archive.findFile('xl/$_stylesTarget');
      if (styles != null) {
        styles.decompress();
        var document = parse(UTF8.decode(styles.content));
  