code: public List<Issue> getClosesIssues(Object projectIdOrPath, Integer mergeRequestIid) throws GitLabApiException {
          return (getClosesIssues(projectIdOrPath, mergeRequestIid, getDefaultPerPage()).all());
      }
docs: Get list 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
  @return a List containing all the issues that would be closed by merging the provided merge request
  @throws GitLabApiException if any exception occurs