const go.opencensus.io/tag.tagsVersionID

4 uses

	go.opencensus.io/tag (current package)
		map_codec.go#L33: 	tagsVersionID = byte(0)
		map_codec.go#L171: 	eg.writeByte(tagsVersionID)
		map_codec.go#L204: 	if version > tagsVersionID {
		map_codec.go#L205: 		return fmt.Errorf("cannot decode: unsupported version: %q; supports only up to: %q", version, tagsVersionID)