@Override
    @JsonIgnore
    public int getEvaluationPriority() {
        return 0;
    }
Defines a filter that requires the presence of a validUntil
attribute on the root element of the metadata document.
A maximum validity interval of less than 1 means that
no restriction is placed on the metadata's validUntil attribute.
support/cas-server-support-saml-idp-core/src/main/java/org/apereo/cas/support/saml/services/SamlRegisteredService.java