{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
                let start_line = line_index.index.line_col(frange.range.start()).line;
                let frange = try_default!(from_proto::file_range(snap, &text_document, range)?);
                let end_line = line_index.index.line_col(frange.range.end()).line;