@Override
    public Collection<AuthenticationPostProcessor> getAuthenticationPostProcessors(final AuthenticationTransaction transaction) {
        val list = new ArrayList<>(this.authenticationPostProcessors);
        AnnotationAwareOrderComparator.sort(list);
        LOGGER.trace("Sorted and registered authentication post processors for this transaction are [{}]", list);
        return list;
    }
This is {@link DefaultAuthenticationEventExecutionPlan}.

@author Misagh Moayyed
@since 5.1.0
core/cas-server-core-authentication-api/src/main/java/org/apereo/cas/authentication/DefaultAuthenticationEventExecutionPlan.java