client.go
func OptImportThreadCount(count int) ImportOption {
	return func(options *ImportOptions) error {
		options.threadCount = count
		return nil
	}
}
func OptImportThreadCount(count int) ImportOption {
	return func(options *ImportOptions) error {
		options.threadCount = count
		return nil
	}
}
func OptImportThreadCount ( count int ) ImportOption { return func ( options * ImportOptions ) error { options . threadCount = count return nil } }
// OptImportThreadCount is the number of goroutines allocated for import.
OptImportThreadCount is the number of goroutines allocated for import .