> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# MessagesMessageParamContentUnion5

## Supported Types

###

```go theme={null}
messagesMessageParamContentUnion5 := components.CreateMessagesMessageParamContentUnion5Str(string{/* values here */})
```

###

```go theme={null}
messagesMessageParamContentUnion5 := components.CreateMessagesMessageParamContentUnion5ArrayOfMessagesMessageParamContentUnion4([]components.MessagesMessageParamContentUnion4{/* values here */})
```

## Union Discrimination

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

```go theme={null}
switch messagesMessageParamContentUnion5.Type {
	case components.MessagesMessageParamContentUnion5TypeStr:
		// messagesMessageParamContentUnion5.Str is populated
	case components.MessagesMessageParamContentUnion5TypeArrayOfMessagesMessageParamContentUnion4:
		// messagesMessageParamContentUnion5.ArrayOfMessagesMessageParamContentUnion4 is populated
}
```