code: public Optional<BoardList> getOptionalBoardList(Object projectIdOrPath, Integer boardId, Integer listId) {
          try {
              return (Optional.ofNullable(getBoardList(projectIdOrPath, boardId, listId)));
          } catch (GitLabApiException glae) {
              return (GitLabApi.createOptionalFromException(glae));
          }
      }
docs: Get a single issue board list as an Optional instance.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/boards/:board_id/lists/:list_id</code></pre>
  
  @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param boardId the ID of the board
  @param listId the ID of the board lists to get
  @return a BoardList instance for the specified board ID and list ID as an Optional instance