pub fn get_planes_trie() -> CodePointTrie<'static, u8>Expand description
Return a CodePointTrie that returns the Unicode plane number, an
integer from 0-16 inclusive, for each code point. This CodePointTrie
does not actually represent any Unicode property, but it is provided in
case it is useful to users of CodePointTrie for testing or other
purposes. See https://www.unicode.org/glossary/#plane.