code: public Optional<WikiPage> getOptionalPage(Object projectIdOrPath, String slug) {
          try {
              return (Optional.ofNullable(getPage(projectIdOrPath, slug)));
          } catch (GitLabApiException glae) {
              return (GitLabApi.createOptionalFromException(glae));
          }
      }
docs: Get a single page of project wiki as an Optional instance.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/wikis/:slug</code></pre>
  
  @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param slug the slug of the project's wiki page
  @return the specified project Snippet as an Optional instance