code: func (inbox *Inbox) Next() bool {
  	return inbox.next(false, map[string]string{
  		"persistentBadging": "true",
  		"use_unified_inbox": "true",
  		"cursor":            inbox.Cursor,
  	})
  }
docs: // Next allows pagination over messages.
  //
  // See example: examples/inbox/next.go