# WHMCS\Domain\Extra

`Class` · extends `AbstractModel`

Used to store information related to the domain that is not an additional field.

## Properties

| Type | Name | Description |
|  --- | --- | --- |
| `` | `$guardedForUpdate` | Fields that cannot be updated once set. |


## Methods

### domain

```php
public function domain()
```

Each extra record belongs to one domain.

**Returns** `BelongsTo`

### createTable

```php
public function createTable($drop = false)
```

Create table schema

**Parameters**

| Type | Name | Description |
|  --- | --- | --- |
| `bool|false` | `$drop` | Drop pre-existing tables |