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
	}
}
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.
OptImportBatchSize is the number of records read before importing them .