# Interface: Extension


**`Since`**

0.2.0

## Properties

### vm

• `Optional` `Readonly` **vm**: [`ExtensionVM`](/reference/api/extensions-sdk/Extension/ExtensionVM/)

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### host

• `Optional` `Readonly` **host**: [`ExtensionHost`](/reference/api/extensions-sdk/Extension/ExtensionHost/)

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### image

• `Readonly` **image**: `string`

**`Since`**

0.3.3