// }}
// {{ PersistenceMechanismInstaller
public PersistenceMechanismInstaller addPersistorAnnotatedOn(final Class<?> javaClass) throws InstantiationException, IllegalAccessException {
final Persistor annotation = javaClass.getAnnotation(Persistor.class);
if (annotation != null) {
return addPersistorRepresentedBy(annotation);
} else {
return new InMemoryPersistenceMechanismInstallerWithinJunit();
}