@Override
    public void registerAuthenticationPostProcessor(final AuthenticationPostProcessor processor) {
        if (BeanSupplier.isNotProxy(processor)) {
            LOGGER.debug("Registering authentication post processor [{}] into the execution plan", processor);
            authenticationPostProcessors.add(processor);
        }
    }
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