code: function (url, binary, callback) {
      var data;
      var self = this;
      fileLoader.crossOrigin = 'anonymous';
      if (binary === true) {
        fileLoader.setResponseType('arraybuffer');
      }
      fileLoader.load(url, function (buffer) {
        if (binary === true) {
          data = self.loadStrokeBinary(buffer);
        } else {
          data = JSON.parse(buffer);
        }
        if (callback) { callback(data); }
      });
    }
docs: XHR for data.