# Interface ToOneRelationshipChange

All Superinterfaces:
  `PropertyChange`

All Known Implementing Classes:
  `MutableToOneRelationshipChange`

public interface ToOneRelationshipChange extends PropertyChange

Since:
  4.0

- ## Method Summary

  Modifier and Type
  Method
  Description
  `ObjectId`
  `getNewValue()`
  `ObjectId`
  `getOldValue()`

  ### Methods inherited from interface PropertyChange

  `accept`

- ## Method Details

  - ### getOldValue

    ObjectId getOldValue()

  - ### getNewValue

    ObjectId getNewValue()