docs: public Commit getMergeBase(Object projectIdOrPath, List<String> refs) throws GitLabApiException {
          GitLabApiForm queryParams = new GitLabApiForm().withParam("refs", refs, true);
          Response response = get(Response.Status.OK, queryParams.asMap(), "projects",
                  getProjectIdOrPath(projectIdOrPath), "repository", "merge_base");
          return (response.readEntity(Commit.class));
      }