Class Atk4\Data\Reference\ContainsOne

`extends`	`ContainsBase`

Atk4\Data\Reference uses DiContainerTrait, InitializerTrait, TrackableTrait
- Atk4\Data\Reference\ContainsBase uses ContainsSeedHackTrait
  - Atk4\Data\Reference\ContainsOne

Located at data/src/Reference/ContainsOne.php

Methods
`protected`	`getDefaultPersistence(Model $theirModel): Persistence` Returns default persistence for theirModel. Returns default persistence for theirModel. Overrides `Atk4\Data\Reference::getDefaultPersistence()`	#
`public`	`ref(Model $ourModel, array $defaults = []): Model` Returns referenced model without any extra conditions. However other relationship types may override this to imply… Returns referenced model without any extra conditions. However other relationship types may override this to imply conditions. Overrides `Atk4\Data\Reference::ref()`	#

Methods inherited from Atk4\Data\Reference\ContainsBase
`init()`

Methods inherited from Atk4\Data\Reference
`__construct(), setOwner(), assertReferenceValueNotNull(), getOurFieldName(), getOurField(), getOurFieldValue(), getTheirFieldName(), onHookToOurModel(), onHookToTheirModel(), getDesiredName(), getOurModel(), createTheirModel(), initTableAlias(), addToPersistence(), refModel(), __debugInfo(), getOwner()`

Methods used from Atk4\Core\DiContainerTrait
`setDefaults(), setMissingProperty(), assertInstanceOf(), _fromSeedPrecheck(), fromSeed(), fromSeedUnsafe()`

Methods used from Atk4\Core\InitializerTrait
`isInitialized(), assertIsInitialized(), invokeInit()`

Methods used from Atk4\Core\TrackableTrait
`issetOwner(), unsetOwner(), destroy()`

Methods used from Atk4\Data\Reference\ContainsSeedHackTrait
`getOurModelPassedToRefXxx()`

Properties inherited from Atk4\Data\Reference\ContainsBase
`$checkTheirType, $type, $system, $ui, $tableAlias`

Properties inherited from Atk4\Data\Reference
`$link, $model, $ourField, $theirField, $caption`

Properties used from Atk4\Core\InitializerTrait
`$_initialized`

Properties used from Atk4\Core\TrackableTrait
`$_owner, $shortName`