private exportToJson(objectData: SomeObject) {
    let filename = "export.json";
    let contentType = "application/json;charset=utf-8;";
    if (window.navigator && window.navigator.msSaveOrOpenBlob) {
      var blob = new Blob([decodeURIComponent(encodeURI(JSON.stringify(objectData)))], { type: contentType });
      navigator.msSaveOrOpenBlob(blob, filename);
    } else {
      var a = document.createElement('a');
      a.download = filename;
      a.href = 'data:' + contentType + ',' + encodeURIComponent(JSON.stringify(objectData));
      a.target = '_blank';
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
    }
  }