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

# pattern • Rust AI Agent SDK

> pattern: Set pattern.

# pattern

<div className="flex items-center gap-2">
  <Badge color="purple">Method</Badge>
</div>

> This is a method of the [**PolicyRule**](../classes/PolicyRule) class in the [**policy**](../modules/policy) module.

Set pattern.

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def pattern(mut self, pattern: impl Into<String>) -> Self
```

## Parameters

<ParamField query="pattern" type="impl Into<String>" required={true}>
  No description available.
</ParamField>

### Returns

<ResponseField name="Returns" type="Self">
  The result of the operation.
</ResponseField>