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lang: en
title: 'API docs: socketio.socket_io_metadata'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/socketio
permalink: /doc/en/lb4/apidocs.socketio.socket_io_metadata.html
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[Home](./index.md) > [@loopback/socketio](./socketio.md) > [SOCKET\_IO\_METADATA](./socketio.socket_io_metadata.md)
## SOCKET\_IO\_METADATA variable
<b>Signature:</b>
```typescript
SOCKET_IO_METADATA: MetadataAccessor<SocketIoMetadata, ClassDecorator>
```