> ## 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.

# Is None • Rust AI Agent SDK

> is_none: Check if value is none/disabled

# is\_none

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

> This is a method of the [**ResolvedValue**](../classes/ResolvedValue) class in the [**param\_resolver**](../modules/param_resolver) module.

Check if value is none/disabled

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def is_none(&self) -> bool
```

### Returns

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