code: function (path, onsuccess, onerror) {
          vendor.request.get({
              url: path,
              responseType: 'arraybuffer',
              onload: function (buffer) {
                  onsuccess && onsuccess(buffer);
              },
              onerror: function (buffer) {
                  onerror && onerror(buffer);
              }
          });
      }
docs: Buffer loader
  @param {string}
  @param {Function} onsuccess
  @param {Function} onerror