text: export var parseFetch = function (options, response) {
      if (options.responseType === 'arraybuffer') {
          return response.arrayBuffer();
      }
      if (options.dataType === 'json' || typeof options.dataType === 'undefined') {
          return response.json();
      }
      if (options.responseType === 'text') {
          return response.text();
      }
      return Promise.resolve(null);
  };
  