in src/main/java/org/apache/sling/jcr/registration/AbstractRegistrationSupport.java [176:184]
protected String getName(ServiceReference reference) {
String name = (String) reference.getProperty(REPOSITORY_REGISTRATION_NAME);
if (name == null || name.length() == 0) {
logger.debug("registerRepository: Repository not to be registered");
return null;
}
return name;
}