func ExampleTable_LoaderFrom_reader() {
	ctx := context.Background()
	client, err := bigquery.NewClient(ctx, "project-id")
	if err != nil {
		// TODO: Handle error.
	}
	f, err := os.Open("data.csv")
	if err != nil {
		// TODO: Handle error.
	}
	rs := bigquery.NewReaderSource(f)
	rs.AllowJaggedRows = true
	// TODO: set other options on the GCSReference.
	ds := client.Dataset("my_dataset")
	loader := ds.Table("my_table").LoaderFrom(rs)
	loader.CreateDisposition = bigquery.CreateNever
	// TODO: set other options on the Loader.
	job, err := loader.Run(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	status, err := job.Wait(ctx)
	if err != nil {
		// TODO: Handle error.
	}
	if status.Err() != nil {
		// TODO: Handle error.
	}
}
func importFromFile(client *bigquery.Client, datasetID, tableID, filename string) error {
	ctx := context.Background()
	// [START bigquery_import_from_file]
	f, err := os.Open(filename)
	if err != nil {
		return err
	}
	source := bigquery.NewReaderSource(f)
	source.AllowJaggedRows = true
	// TODO: set other options on the GCSReference.

	loader := client.Dataset(datasetID).Table(tableID).LoaderFrom(source)
	loader.CreateDisposition = bigquery.CreateNever
	// TODO: set other options on the Loader.

	job, err := loader.Run(ctx)
	if err != nil {
		return err
	}
	status, err := job.Wait(ctx)
	if err != nil {
		return err
	}
	if err := status.Err(); err != nil {
		return err
	}
	// [END bigquery_import_from_file]
	return nil
}