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## com.bea.netuix.application.identifier
Interface NavigableInstanceId

All Superinterfaces
  InstanceId

All Known Implementing Classes:
  BookInstanceId, PageInstanceId

    public interface NavigableInstanceId

extends InstanceId

The `InstanceId` implemented by `Book`s and `Page`s, which are navigables. The `InstanceId` is stored in the database and uniquely identifies each instance of a `Book` or `Page`.

Method Summary
`int` | `getId()` Used when customizing `Book`s and `Page`s.

Method Detail

### getId

    int getId()

  Used when customizing `Book`s and `Page`s. Should not be null, but it's possible for this getter to return null if our internal API's were not called when creating the navigable, and the developer did not explicitly set it.

  Returns
    an integer representing the unique `InstanceId` for this navigable.

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