> ## Documentation Index
> Fetch the complete documentation index at: https://cantonfoundation-fix-878-websocket-update-format.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# InterfaceCompanion

> Metadata and utilities associated with an interface as a whole. Its subclasses serve to disambiguate various generated toInterface overloads.

## InterfaceCompanion

Upstream docs: [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/javaapi/data/codegen/InterfaceCompanion.html)

**Signature**

```text theme={"theme":{"light":"github-light","dark":"github-dark"}}
public class InterfaceCompanion<I,Id,View> extends ContractTypeCompanion<Contract<Id,View>,Id,I,View>
```

**Members**

| Docs                                                                                                                                                                                                                                                     | Member                                                       | Introduced | Deprecated | Removed |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ | ---------- | ---------- | ------- |
| [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/javaapi/data/codegen/InterfaceCompanion.html#fromCreatedEvent%28com.daml.ledger.javaapi.data.CreatedEvent%29)                                                                 | `fromCreatedEvent(CreatedEvent)`                             | `3.4.8`    | -          | -       |
| [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/javaapi/data/codegen/InterfaceCompanion.html#fromCreatedEvent%28com.daml.ledger.javaapi.data.CreatedEvent,com.daml.ledger.javaapi.data.codegen.UnknownTrailingFieldPolicy%29) | `fromCreatedEvent(CreatedEvent, UnknownTrailingFieldPolicy)` | `3.5.6`    | -          | -       |
| [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/javaapi/data/codegen/InterfaceCompanion.html#fromJson%28java.lang.String%29)                                                                                                  | `fromJson(String)`                                           | `3.4.8`    | -          | -       |
| [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/javaapi/data/codegen/InterfaceCompanion.html#valueDecoder)                                                                                                                    | `valueDecoder`                                               | `3.4.8`    | -          | -       |
| [Open](https://javadoc.io/doc/com.daml/bindings-java/3.5.6/com/daml/ledger/javaapi/data/codegen/InterfaceCompanion.html#withPackageId%28java.lang.String%29)                                                                                             | `withPackageId(String)`                                      | `3.5.6`    | -          | -       |