A CopyPolicy is used to set an
org.eclipse.persistence.descriptors.copying.CopyPolicy on an Entity.
It is required that a class that
implements org.eclipse.persistence.descriptors.copying.CopyPolicy
be specified as the argument.
A CopyPolicy should be specified on an Entity, MappedSuperclass or
Embeddable.
For instance:
@Entity
@CopyPolicy("example.MyCopyPolicy")