code: public Pager<MergeRequest> getClosedByMergeRequests(Object projectIdOrPath, Integer issueIid, int itemsPerPage) throws GitLabApiException {
          return new Pager<MergeRequest>(this, MergeRequest.class, itemsPerPage, null,
                  "projects", getProjectIdOrPath(projectIdOrPath), "issues", issueIid, "closed_by");
      }
docs: Get a Pager containing all the merge requests that will close issue when merged.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/issues/:issue_iid/closed_by</code></pre>
  
  @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
  @param issueIid the internal ID of a project's issue
  @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