Delete unused volumes

        Args:
            filters (dict): Filters to process on the prune list.

        Returns:
            (dict): A dict containing a list of deleted volume names and
                the amount of disk space reclaimed in bytes.

        Raises:
            :py:class:`docker.errors.APIError`
                If the server returns an error.

def prune_volumes(self, filters=None):
        """
        Delete unused volumes

        Args:
            filters (dict): Filters to process on the prune list.

        Returns:
            (dict): A dict containing a list of deleted volume names and
                the amount of disk space reclaimed in bytes.

        Raises:
            :py:class:`docker.errors.APIError`
                If the server returns an error.
        """
        params = {}
        if filters:
            params['filters'] = utils.convert_filters(filters)
        url = self._url('/volumes/prune')
        return self._result(self._post(url, params=params), True)