Idempotency for BigQuery load jobs using Google.Cloud.BigQuery.V2

You are able to create a csv load job to load data from a csv file in Google Cloud Storage by using the BigQueryClient in Google.Cloud.BigQuery.V2 which has a CreateLoadJob method.

How can you guarantee idempotency with this API to ensure that say the network dropped before getting a response and you kicked off a retry you would not end up with the same data being loaded into BigQuery multiple times?

Example API usage

    private void LoadCsv(string sourceUri, string tableId, string timePartitionField)
    {
        var tableReference = new TableReference()
        {
            DatasetId = _dataSetId,
            ProjectId = _projectId,
            TableId = tableId
        };

        var options = new CreateLoadJobOptions
        {
            WriteDisposition = WriteDisposition.WriteAppend,
            CreateDisposition = CreateDisposition.CreateNever,
            SkipLeadingRows = 1,
            SourceFormat = FileFormat.Csv,
            TimePartitioning = new TimePartitioning
            {
                Type = _partitionByDayType,
                Field = timePartitionField
            }
        };

        BigQueryJob loadJob = _bigQueryClient.CreateLoadJob(sourceUri: sourceUri,
                                                            destination: tableReference,
                                                            schema: null,
                                                            options: options);

        loadJob.PollUntilCompletedAsync().Wait();
        if (loadJob.Status.Errors == null || !loadJob.Status.Errors.Any())
        {
            //Log success
            return;
        }
        //Log error
    }