docs: public List<Milestone> getMilestones(Object projectIdOrPath, MilestoneState state) throws GitLabApiException {
          Form formData = new GitLabApiForm().withParam("state", state).withParam(PER_PAGE_PARAM, getDefaultPerPage());
          Response response = get(Response.Status.OK, formData.asMap(),
                  "projects", getProjectIdOrPath(projectIdOrPath), "milestones");
          return (response.readEntity(new GenericType<List<Milestone>>() {}));
      }