A protocol allows at most 64 UTF-8 bytes for a display label. Which check enforces that c…

A protocol allows at most 64 UTF-8 bytes for a display label. Which check enforces that contract?

1. text.length <= 64
2. [...text].length <= 64
3. new TextEncoder().encode(text).length <= 64
4. [...new Intl.Segmenter("en", { granularity: "grapheme" }).segment(text)].length <= 64