# yii2\extensions\nestedsets\exception

> 1 enum of the yii2\extensions\nestedsets\exception namespace.

[API reference](/docs/api/index.md) › [Nested sets behavior](/docs/extensions/nested-sets-behavior/reference/index.md) › exception

## Enums

| Enum | Summary |
| --- | --- |
| [`Message`](/docs/extensions/nested-sets-behavior/reference/exception/message/index.md) | Defines nested sets exception message templates. |