docs: def get_folders(cls, session, mailbox_or_id):
          """List the folders for the mailbox.
  
          Args:
              mailbox_or_id (helpscout.models.Mailbox or int): Mailbox or the ID
                  of the mailbox to get the folders for.
  
          Returns:
              RequestPaginator(output_type=helpscout.models.Folder): Folders
                  iterator.
          """
          if isinstance(mailbox_or_id, Mailbox):
              mailbox_or_id = mailbox_or_id.id
          return cls(
              '/mailboxes/%d/folders.json' % mailbox_or_id,
              session=session,
              out_type=Folder,
          )