client.go
func OptImportRoaring(enable bool) ImportOption {
	return func(options *ImportOptions) error {
		options.wantRoaring = &enable
		return nil
	}
}
func OptImportRoaring(enable bool) ImportOption {
	return func(options *ImportOptions) error {
		options.wantRoaring = &enable
		return nil
	}
}
// OptImportRoaring enables importing using roaring bitmaps which is more performant.