ion attribute of
     type <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link"><code>Map</code></a>, in which case the converter is applied
     to the keys or values of the map, or to the specified attribute of
     the embeddable instances contained in the map, or
 <li>an entity class which extends a <a href="MappedSuperclass.html" title="annotation interface in jakarta.persistence">mapped
     superclass</