client.go
func OptImportBatchSize(batchSize int) ImportOption {
	return func(options *ImportOptions) error {
		options.batchSize = batchSize
		return nil
	}
}
func OptImportBatchSize(batchSize int) ImportOption {
	return func(options *ImportOptions) error {
		options.batchSize = batchSize
		return nil
	}
}
// OptImportBatchSize is the number of records read before importing them.