must be annotated with the <code>Converter</code> annotation or
 declared as a converter in the object/relational mapping descriptor.
 The target type for a converter is determined by the actual type
 argument of the first type parameter of <code>AttributeConverter</code>.

 <p>If <a href="#autoApply()"><code>autoApply = true</code></a>, the persistence provider
 must automatically apply the converter to every mapped attribute of
 the specified target type belonging to any entity in the persistence
 unit, e