@Override
    public void extract(final HazelcastTicketDocument ticketHolder,
                        final String attributeName,
                        final ValueCollector valueCollector) {
        val values = ticketHolder.getAttributes().get(attributeName);
        if (values != null) {
            valueCollector.addObject(new MultiResult<>(values));
        }
    }
This is {@link MapAttributeValueExtractor}.

@author Misagh Moayyed
@since 7.0.0
support/cas-server-support-hazelcast-ticket-registry/src/main/java/org/apereo/cas/ticket/registry/MapAttributeValueExtractor.java