code: public Pager<Discussion> getMergeRequestDiscussionsPager(Object projectIdOrPath, Integer mergeRequestIid, int itemsPerPage) throws GitLabApiException {
          return (new Pager<Discussion>(this, Discussion.class, itemsPerPage, null,
                "projects", getProjectIdOrPath(projectIdOrPath), "merge_requests", mergeRequestIid, "discussions"));
      }
docs: Get a Pager of Discussion instances for the specified merge request.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/merge_requests/:merge_request_iid/discussions</code></pre>
  
  @param projectIdOrPath projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param mergeRequestIid the internal ID of the merge request
  @param itemsPerPage the number of Discussion instances that will be fetched per page
  @return a Pager containing the Discussion instances for the specified merge request
  @throws GitLabApiException if any exception occurs during execution