{"ast_node_type":"variable","tokens":[{"end":35,"kind":"keyword","start":0,"text":"let"}]}
        let mut col = line_col.col;
    pub fn to_utf8(&self, enc: WideEncoding, line_col: WideLineCol) -> Option<LineCol> {
        if let Some(wide_chars) = self.line_wide_chars.get(&line_col.line) {