code: @Help(help = "Scales out/add a VNF to a running NetworkServiceRecord with specific id")
    public void restartVnfr(final String idNsr, final String idVnfr, String imageName)
        throws SDKException {
      HashMap<String, Serializable> jsonBody = new HashMap<>();
      jsonBody.put("imageName", imageName);
      String url = idNsr + "/vnfrecords" + "/" + idVnfr + "/restart";
      requestPost(url, jsonBody);
    }
docs: Restarts a VNFR in a running NSR.
  
  @param idNsr the ID of the NetworkServiceRecord
  @param idVnfr the ID of the VNFR to restart
  @param imageName rebuilding the VNFR with a different image if defined
  @throws SDKException if the request fails