docs: public static Map<String, MultifactorAuthenticationProvider> getAvailableMultifactorAuthenticationProviders(
          final ApplicationContext applicationContext) {
          try {
              return applicationContext.getBeansOfType(MultifactorAuthenticationProvider.class, false, true);
          } catch (final Exception e) {
              LOGGER.trace("No beans of type [{}] are available in the application context. "
                      + "CAS may not be configured to handle multifactor authentication requests in absence of a provider",
                  MultifactorAuthenticationProvider.class);
          }
          return new HashMap<>(0);
      }