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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def update_entity_type(self, entity_type, language_code=None, update_mask=None, retry=google.api_core.gapic_v1.method.DEFAULT, timeout=google.api_core.gapic_v1.method.DEFAULT, metadata=None):
 """ Updates the specified entity type. Example: Args: entity_type (Union[dict, ~google.cloud.dialogflow_v2.types.EntityType]):
 Required. The entity type to update. Format: ``projects/<Project ID>/agent/entityTypes/<EntityType ID>``. If a dict is provided, it must be of the same form as the protobuf message :class:`~google.cloud.dialogflow_v2.types.EntityType` language_code (str):
 Optional. The language of entity synonyms defined in ``entity_type``. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used. update_mask (Union[dict, ~google.cloud.dialogflow_v2.types.FieldMask]):
 Optional. The mask to control which fields get updated. If a dict is provided, it must be of the same form as the protobuf message :class:`~google.cloud.dialogflow_v2.types.FieldMask` 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.dialogflow_v2.types.EntityType` 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 'update_entity_type' not in self._inner_api_calls:
            self._inner_api_calls[
                'update_entity_type'] = google.api_core.gapic_v1.method.wrap_method(
                    self.transport.update_entity_type,
                    default_retry=self._method_configs[
                        'UpdateEntityType'].retry,
                    default_timeout=self._method_configs['UpdateEntityType']
                    .timeout,
                    client_info=self._client_info,
                )

        request = entity_type_pb2.UpdateEntityTypeRequest(
            entity_type=entity_type,
            language_code=language_code,
            update_mask=update_mask,
        )
        return self._inner_api_calls['update_entity_type'](
            request, retry=retry, timeout=timeout, metadata=metadata)