docs: public static String getIssuerFromSamlObject(final SAMLObject object) {
          if (object instanceof RequestAbstractType) {
              return RequestAbstractType.class.cast(object).getIssuer().getValue();
          }
          if (object instanceof StatusResponseType) {
              return StatusResponseType.class.cast(object).getIssuer().getValue();
          }
          return null;
      }