docs: function BucketEmptyError(bucket, limiterId) {
    Error.call(this);
    // captureStackTrace is V8-only (node, chrome)
    Error.captureStackTrace(this, BucketEmptyError);
  
    this.name = 'BucketEmptyError';
    this.message = util.format('%s - All {%d} tokens from this bucket have been used. Retry after %s',
      limiterId || 'anonymous limiter',
      bucket.limit,
      new Date(parseInt(bucket.reset, 10))
    );
  }