code: public List<Runner> getAllRunners(int page, int perPage) throws GitLabApiException {
          return (getAllRunners(null, page, perPage));
      }
docs: Get a list of all runners in the GitLab instance (specific and shared). Access is restricted to users with admin privileges.
  
  <pre><code>GitLab Endpoint: GET /runners/all</code></pre>
  
  @param page    The page offset of runners
  @param perPage The number of runners to get after the page offset
  @return a list of all runners in the GitLab instance
  @throws GitLabApiException if any exception occurs