@Override
    public Map<String, List<Object>> getAttributesInternal(final RegisteredServiceAttributeReleasePolicyContext context,
                                                           final Map<String, List<Object>> attrs) {
        return authorizeMappedAttributes(context, attrs);
    }
Return a collection of allowed attributes for the principal, but additionally,
offers the ability to resolve those attributes from a set attributes that provide the value.

@author Misagh Moayyed
@since 7.0.0
core/cas-server-core-authentication-attributes/src/main/java/org/apereo/cas/services/ReturnLinkedAttributeReleasePolicy.java