<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def batch_delete_entities(self, parent, entity_values, language_code=None, retry=google.api_core.gapic_v1.method.DEFAULT, timeout=google.api_core.gapic_v1.method.DEFAULT, metadata=None):
 """ Deletes entities in the specified entity type. Operation <response: ``google.protobuf.Empty``, metadata: [google.protobuf.Struct][google.protobuf.Struct]> Example: Args: parent (str):
 Required. The name of the entity type to delete entries for. Format: ``projects/<Project ID>/agent/entityTypes/<Entity Type ID>``. entity_values (list[str]):
 Required. The canonical ``values`` of the entities to delete. Note that these are not fully-qualified names, i.e. they don't start with ``projects/<Project ID>``. language_code (str):
 Optional. The language of entity synonyms defined in ``entities``. 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. 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._OperationFuture` 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 'batch_delete_entities' not in self._inner_api_calls:
            self._inner_api_calls[
                'batch_delete_entities'] = google.api_core.gapic_v1.method.wrap_method(
                    self.transport.batch_delete_entities,
                    default_retry=self._method_configs[
                        'BatchDeleteEntities'].retry,
                    default_timeout=self._method_configs['BatchDeleteEntities']
                    .timeout,
                    client_info=self._client_info,
                )

        request = entity_type_pb2.BatchDeleteEntitiesRequest(
            parent=parent,
            entity_values=entity_values,
            language_code=language_code,
        )
        operation = self._inner_api_calls['batch_delete_entities'](
            request, retry=retry, timeout=timeout, metadata=metadata)
        return google.api_core.operation.from_gapic(
            operation,
            self.transport._operations_client,
            empty_pb2.Empty,
            metadata_type=struct_pb2.Struct,
        )