> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# MessagesMessageParamContentUnion3 - Go SDK

> MessagesMessageParamContentUnion3 type definition

<Warning>
  The Go SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues).
</Warning>

## Supported Types

###

```go lines theme={null}
messagesMessageParamContentUnion3 := components.CreateMessagesMessageParamContentUnion3ArrayOfAnthropicWebSearchResultBlockParam([]components.AnthropicWebSearchResultBlockParam{/* values here */})
```

### ContentWebSearchToolResultError

```go lines theme={null}
messagesMessageParamContentUnion3 := components.CreateMessagesMessageParamContentUnion3ContentWebSearchToolResultError(components.ContentWebSearchToolResultError{/* values here */})
```

## Union Discrimination

Use the `Type` field to determine which variant is active, then access the corresponding field:

```go lines theme={null}
switch messagesMessageParamContentUnion3.Type {
	case components.MessagesMessageParamContentUnion3TypeArrayOfAnthropicWebSearchResultBlockParam:
		// messagesMessageParamContentUnion3.ArrayOfAnthropicWebSearchResultBlockParam is populated
	case components.MessagesMessageParamContentUnion3TypeContentWebSearchToolResultError:
		// messagesMessageParamContentUnion3.ContentWebSearchToolResultError is populated
}
```