code: function Response(body, ref) {
      var url = ref.url;
      var headers = ref.headers;
      var status = ref.status;
      var statusText = ref.statusText;
  
  
      this.url = url;
      this.ok = status >= 200 && status < 300;
      this.status = status || 0;
      this.statusText = statusText || '';
      this.headers = new Headers(headers);
      this.body = body;
  
      if (isString(body)) {
  
          this.bodyText = body;
  
      } else if (isBlob(body)) {
  
          this.bodyBlob = body;
  
          if (isBlobText(body)) {
              this.bodyText = blobText(body);
          }
      }
  }
docs: HTTP Response.