One of my classes has an embedded object:

@Entity(access=AccessType.FIELD)
class Foo {
@Embedded
private Bar bar;
}

@Embeddable(access=AccessType.FIELD)
class Bar {
 private String x;
}

Preview 4 does not persist any of bar's fields unless I use @AttributeOverrride:

class Foo {
 @Embedded(@AttributeOverride(name="x", column=@Column(name="X")))
private Bar bar;
}

Is this the correct behavior?
I would have expected field x to be persisted by default.