{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
    let Some(&(_, u_name, ascii_str)) = UNICODE_ARRAY.iter().find(|&&(c, _, _)| c == ch) else {
) -> (Option<token::TokenKind>, Option<TokenSubstitution>) {
        return (None, None);