code: def _descend_folder_for_id(parsed_path, folder_id):
      
      if len(parsed_path) == 0:
          return folder_id
  
      session.token = verify_credentials()
  
      base_folder = session.communicator.folder_get(session.token,
                                                    folder_id)
      cur_folder_id = -1
      for path_part in parsed_path:
          cur_folder_id = base_folder['folder_id']
          cur_children = session.communicator.folder_children(
              session.token, cur_folder_id)
          for inner_folder in cur_children['folders']:
              if inner_folder['name'] == path_part:
                  base_folder = session.communicator.folder_get(
                      session.token, inner_folder['folder_id'])
                  cur_folder_id = base_folder['folder_id']
                  break
          else:
              return -1
      return cur_folder_id
docs: Descend a path to return a folder id starting from the given folder id.
  
      :param parsed_path: a list of folders from top to bottom of a hierarchy
      :type parsed_path: list[string]
      :param folder_id: The id of the folder from which to start the descent
      :type folder_id: int | long
      :returns: The id of the found folder or -1
      :rtype: int | long