func NewDiskCache(delegate http.RoundTripper, cacheDir string, cacheSizeGB, maxConcurrency int) http.RoundTripper {
	return NewFromCache(delegate, diskcache.NewWithDiskv(
		diskv.New(diskv.Options{
			BasePath:     path.Join(cacheDir, "data"),
			TempDir:      path.Join(cacheDir, "temp"),
			CacheSizeMax: uint64(cacheSizeGB) * uint64(1000000000), // convert G to B
		})),
		maxConcurrency,
	)
}
func NewDiskCache(delegate http.RoundTripper, cacheDir string, cacheSizeGB, maxConcurrency int) http.RoundTripper {
	return NewFromCache(delegate, diskcache.NewWithDiskv(
		diskv.New(diskv.Options{
			BasePath:     path.Join(cacheDir, "data"),
			TempDir:      path.Join(cacheDir, "temp"),
			CacheSizeMax: uint64(cacheSizeGB) * uint64(1000000000), // convert G to B
		})),
		maxConcurrency,
	)
}
// NewDiskCache creates a GitHub cache RoundTripper that is backed by a disk
// cache.