# Annotation: com.pnfsoftware.jeb.util.serialization.annotations.Ser

Mark a type as serializable by the PNF\-ORPD mechanism. If the highest\-level parent is not [Object](Object), also see [SerConstructor](SerConstructor).

## Method: oldId
- return type: `int`

Description: Optionally set the previous external id used by this type. Useless in most cases.