Used to override mappings of multiple properties or fields.

   Example:

   @Embedded
   @AttributeOverrides({
           @AttributeOverride(name="startDate", 
                              column=@Column("EMP_START")),
           @AttributeOverride(name="endDate", 
                              column=@Column("EMP_END"))
   })
   public EmploymentPeriod getEmploymentPeriod() { ... }