code: public Milestone getMilestone(Object projectIdOrPath, Integer milestoneId) throws GitLabApiException {
          Response response = get(Response.Status.OK, getDefaultPerPageParam(),
                  "projects", getProjectIdOrPath(projectIdOrPath), "milestones", milestoneId);
          return (response.readEntity(Milestone.class));
      }
docs: Get the specified milestone.
  
  @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param milestoneId the ID of the milestone tp get
  @return a Milestone instance for the specified IDs
  @throws GitLabApiException if any exception occurs