utils/importer.go
func newInternalFS(prefix string) http.FileSystem {
	// Asset/AssetDir returns `fmt.Errorf("Asset %s not found")`,
	// which does _not_ get mapped to 404 by `http.FileSystem`.
	// Need to convert to `os.ErrNotExist` explicitly ourselves.
	mapNotFound := func(err error) error {
		if err != nil && strings.Contains(err.Error(), "not found") {
			err = os.ErrNotExist
		}
		return err
	}
	return &assetfs.AssetFS{
		Asset: func(path string) ([]byte, error) {
			ret, err := Asset(path)
			return ret, mapNotFound(err)
		},
		AssetDir: func(path string) ([]string, error) {
			ret, err := AssetDir(path)
			return ret, mapNotFound(err)
		},
		Prefix: prefix,
	}
}
func newInternalFS(prefix string) http.FileSystem {
	// Asset/AssetDir returns `fmt.Errorf("Asset %s not found")`,
	// which does _not_ get mapped to 404 by `http.FileSystem`.
	// Need to convert to `os.ErrNotExist` explicitly ourselves.
	mapNotFound := func(err error) error {
		if err != nil && strings.Contains(err.Error(), "not found") {
			err = os.ErrNotExist
		}
		return err
	}
	return &assetfs.AssetFS{
		Asset: func(path string) ([]byte, error) {
			ret, err := Asset(path)
			return ret, mapNotFound(err)
		},
		AssetDir: func(path string) ([]string, error) {
			ret, err := AssetDir(path)
			return ret, mapNotFound(err)
		},
		Prefix: prefix,
	}
}
//go:generate go-bindata -nometadata -ignore .*_test\.|~$DOLLAR -pkg $GOPACKAGE -o bindata.go -prefix ../ ../lib/...