code: public Pager<Issue> getClosesIssues(Object projectIdOrPath, Integer mergeRequestIid, int itemsPerPage) throws GitLabApiException {
          return new Pager<Issue>(this, Issue.class, itemsPerPage, null, 
                  "projects", getProjectIdOrPath(projectIdOrPath), "merge_requests", mergeRequestIid, "closes_issues");
      }
docs: Get a Pager containing all the issues that would be closed by merging the provided merge request.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/merge_requests/:merge_request_iid/closes_issues</code></pre>
  
  @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
  @param mergeRequestIid the IID of the merge request to get the closes issues for
  @param itemsPerPage the number of Issue instances that will be fetched per page
  @return a Pager containing all the issues that would be closed by merging the provided merge request
  @throws GitLabApiException if any exception occurs