---
description: Docker extension API reference
keywords: Docker, extensions, sdk, API, reference
skip_read_time: true
---

# Interface: Extension

**`since`** 0.2.0

## Properties

### vm

• `Optional` `Readonly` **vm**: [`ExtensionVM`](ExtensionVM.md)

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### host

• `Optional` `Readonly` **host**: [`ExtensionHost`](ExtensionHost.md)