ode>OneToOne</code> annotation may be used within an
 embeddable class to specify a relationship from the embeddable
 class to an entity class. If the relationship is bidirectional and
 the entity containing the embeddable class is on the owning side of
 the relationship, the non-owning side must use the
 <code>mappedBy</code> element of the <code>OneToOne</code>
 annotation to specify the relationship field or property of the
 embeddable class. The dot (".") notation syntax must be used in the
 <code>mappe