in src/main/java/org/apache/sling/serviceusermapping/impl/ServiceUserMapperImpl.java [239:249]
protected synchronized void bindServicePrincipalsValidator(final ServicePrincipalsValidator servicePrincipalsValidator, final Map<String, ?> props) {
principalsValidators.add(servicePrincipalsValidator);
Object id = props.get(VALIDATOR_ID);
if (id instanceof String) {
presentPrincipalValidators.add((String) id);
}
if (!requireValidation || !getUserValidators().isEmpty()) {
restartAllActiveServiceUserMappedServices();
}
}