@JsonIgnore
        public boolean isNotAssignedTo(final RegisteredService service) {
            return isNotAssignedTo(service, BooleanUtils::toBoolean);
        }
Is not assigned to boolean.

@param service the service
@return true or false
api/cas-server-core-api-services/src/main/java/org/apereo/cas/services/RegisteredServiceProperty.java