code: public PagedResult<Folder> listFolders(long parentFolderId, PaginationParameters parameters) throws SmartsheetException {
          String path = "folders/" + parentFolderId + "/folders";
  
          if (parameters != null) {
              path += parameters.toQueryString();
          }
  
          return this.listResourcesWithWrapper(path, Folder.class);
      }
docs: List child folders of a given folder.
  
  It mirrors to the following Smartsheet REST API method: GET /folder/{id}/folders
  
  Parameters: - parentFolderId : the parent folder ID
  
  Exceptions:
  InvalidRequestException : if there is any problem with the REST API request
  AuthorizationException : if there is any problem with the REST API authorization(access token)
  ResourceNotFoundException : if the resource can not be found
  ServiceUnavailableException : if the REST API service is not available (possibly due to rate limiting)
  SmartsheetRestException : if there is any other REST API related error occurred during the operation
  SmartsheetException : if there is any other error occurred during the operation
  
  @param parentFolderId the parent folder id
  @param parameters the parameters for pagination
  @return the child folders (note that empty list will be returned if no child folder found)
  @throws SmartsheetException the smartsheet exception