syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"lines.push(LineInfo"}]}
source_snippet:             lines.push(LineInfo { line_index, start_col, end_col: CharPos::from_usize(line_len) });
context_before:             let line_len = lo.file.get_line(line_index).map_or(0, |s| s.chars().count());
context_after:             start_col = CharPos::from_usize(0);