code: public ExternalWikiService getExternalWikiService(Object projectIdOrPath) throws GitLabApiException {
          Response response = this.get(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "services", "external-wiki");
          return (response.readEntity(ExternalWikiService.class));
      }
docs: Get the JIRA service settings for a project.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/services/external-wiki</code></pre>
  
  @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
  @return a ExternalWikiService instance holding the External Wiki service settings
  @throws GitLabApiException if any exception occurs