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

# types

# `prefect_docker.types`

## Functions

### `assert_volume_str` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-docker/prefect_docker/types.py#L7" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
assert_volume_str(volume: str) -> str
```

Validate a Docker volume string and raise `ValueError` if invalid.