default Map<String, List<Object>> getPersonAttributesFromMultivaluedAttributes(final Map<String, List<Object>> attributes) {
        return getPersonAttributesFromMultivaluedAttributes(attributes, Set.of());
    }
Gets person attributes from multivalued attributes.

@param attributes the attributes
@return the person attributes from multivalued attributes
support/cas-server-support-person-directory-core/src/main/java/org/apereo/cas/persondir/groovy/PersonAttributeScriptDao.java