<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def detect_language( self, parent=None, model=None, content=None, mime_type=None, retry=google.api_core.gapic_v1.method.DEFAULT, timeout=google.api_core.gapic_v1.method.DEFAULT, metadata=None, ):
 """ Detects the language of text within a request. Example: Args: parent (str):
 Optional. Only used when making regionalized call. Format: projects/{project-id}/locations/{location-id}. Only custom model within the same location-id can be used. Otherwise 400 is returned. model (str):
 Optional. The language detection model to be used. projects/{project-id}/locations/{location-id}/models/language-detection/{model-id} If not specified, default will be used. content (str):
 The content of the input stored as a string. mime_type (str):
 Optional. The format of the source text, for example, "text/html", "text/plain". If left blank, the MIME type is assumed to be "text/html". retry (Optional[google.api_core.retry.Retry]):
 A retry object used to retry requests. If ``None`` is specified, requests will not be retried. timeout (Optional[float]):
 The amount of time, in seconds, to wait for the request to complete. Note that if ``retry`` is specified, the timeout applies to each individual attempt. metadata (Optional[Sequence[Tuple[str, str]]]):
 Additional metadata that is provided to the method. Returns: A :class:`~google.cloud.translate_v3beta1.types.DetectLanguageResponse` instance. Raises: google.api_core.exceptions.GoogleAPICallError: If the request failed for any reason. google.api_core.exceptions.RetryError: If the request failed due to a retryable error and retry attempts failed. ValueError: If the parameters are invalid. """

        # Wrap the transport method to add retry and timeout logic.
        if "detect_language" not in self._inner_api_calls:
            self._inner_api_calls[
                "detect_language"
            ] = google.api_core.gapic_v1.method.wrap_method(
                self.transport.detect_language,
                default_retry=self._method_configs["DetectLanguage"].retry,
                default_timeout=self._method_configs["DetectLanguage"].timeout,
                client_info=self._client_info,
            )

        # Sanity check: We have some fields which are mutually exclusive;
        # raise ValueError if more than one is sent.
        google.api_core.protobuf_helpers.check_oneof(content=content)

        request = translation_service_pb2.DetectLanguageRequest(
            parent=parent, model=model, content=content, mime_type=mime_type
        )
        if metadata is None:
            metadata = []
        metadata = list(metadata)
        try:
            routing_header = [("parent", parent)]
        except AttributeError:
            pass
        else:
            routing_metadata = google.api_core.gapic_v1.routing_header.to_grpc_metadata(
                routing_header
            )
            metadata.append(routing_metadata)

        return self._inner_api_calls["detect_language"](
            request, retry=retry, timeout=timeout, metadata=metadata
        )