var encoding/base64.URLEncoding

3 uses

	encoding/base64 (current package)
		base64.go#L103: var URLEncoding = NewEncoding(encodeURL)
		base64.go#L113: var RawURLEncoding = URLEncoding.WithPadding(NoPadding)

	google.golang.org/protobuf/encoding/protojson
		decode.go#L465: 		enc = base64.URLEncoding