{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"BytePos(s[..real_start].rfind(\"\\n\").map_or(0,"}]}
                BytePos(s[..real_start].rfind("\n").map_or(0, |i| i as u32 + 1)) + start;
            let line_start =
            let span = self.mk_sp(line_start, frontmatter_opening_end_pos);