async def METHOD_NAME(self, *, qualifier: Optional[str] = None, **kwargs: Any) -> Dict[str, int]:
    """Get optional test coverage report.
    :keyword qualifier: If specified, qualifies the generated report further (e.g. '2.7' vs '3.5'
     in for Python). The only effect is, that generators that run all tests several times, can
     distinguish the generated reports. Default value is None.
    :paramtype qualifier: str
    :return: dict mapping str to int
    :rtype: dict[str, int]
    :raises ~azure.core.exceptions.HttpResponseError:
    Example:
        .. code-block:: python
            # response body for status code(s): 200
            response == {
                "str": 0  # Optional.
            }
    """
    error_map = {
        401: ClientAuthenticationError,
        404: ResourceNotFoundError,
        409: ResourceExistsError,
        304: ResourceNotModifiedError,
    }
    error_map.update(kwargs.pop("error_map", {}) or {})
    _headers = kwargs.pop("headers", {}) or {}
    _params = kwargs.pop("params", {}) or {}
    cls: ClsType[Dict[str, int]] = kwargs.pop("cls", None)
    request = build_auto_rest_report_service_get_optional_report_request(
        qualifier=qualifier,
        headers=_headers,
        params=_params,
    )
    request.url = self._client.format_url(request.url)
    _stream = False
    pipeline_response: PipelineResponse = await self._client._pipeline.run(  # type: ignore # pylint: disable=protected-access
        request, stream=_stream, **kwargs
    )
    response = pipeline_response.http_response
    if response.status_code not in [200]:
        if _stream:
            await response.read()  # Load the body in memory and close the socket
        map_error(status_code=response.status_code, response=response, error_map=error_map)
        raise HttpResponseError(response=response)
    if response.content:
        deserialized = response.json()
    else:
        deserialized = None
    if cls:
        return cls(pipeline_response, cast(Dict[str, int], deserialized), {})
    return cast(Dict[str, int], deserialized)