protected Predicate<Map.Entry<String, List<Object>>> filterProvidedGivenAttributes() {
        return entry -> {
            val attributeName = entry.getKey();
            val attributeValue = entry.getValue();
            LOGGER.debug("Received attribute [{}] with value(s) [{}]", attributeName, attributeValue);
            return attributeValue != null;
        };
    }
Filter provided given attributes predicate.

@return the predicate
core/cas-server-core-services-api/src/main/java/org/apereo/cas/services/support/RegisteredServiceMappedRegexAttributeFilter.java