code: public List<Commit> getCommits(Object projectIdOrPath, int mergeRequestIid, int page, int perPage) throws GitLabApiException {
          Form formData = new GitLabApiForm().withParam("owned", true).withParam(PAGE_PARAM,  page).withParam(PER_PAGE_PARAM, perPage);
          Response response = get(Response.Status.OK, formData.asMap(), "projects", getProjectIdOrPath(projectIdOrPath), "merge_requests", mergeRequestIid, "commits");
          return (response.readEntity(new GenericType<List<Commit>>() {}));
      }
docs: Get a list of merge request commits.
  
  <p>NOTE: GitLab API V4 uses IID (internal ID), V3 uses ID to identify the merge request.</p>
  
  <pre><code>GitLab Endpoint: GET /projects/:id/merge_requests/:merge_request_iid/commits</code></pre>
  
  @param 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 page the page to get
  @param perPage the number of commits per page
  @return a list containing the commits for the specified merge request
  @throws GitLabApiException GitLabApiException if any exception occurs during execution