docs: function(result) {
    if (!result.nextPartitionKey && !result.nextRowKey) {
      return null;
    }
    return (
      encodeURIComponent(result.nextPartitionKey || '').replace(/~/g, '%7e') +
      '~' +
      encodeURIComponent(result.nextRowKey || '').replace(/~/g, '%7e')
    );
  }