{"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"let"}]}
        let &Self { start_line, start_col, end_line, end_col } = self;
    pub(crate) fn make_coverage_span(&self, local_file_id: LocalFileId) -> ffi::CoverageSpan {
        let file_id = local_file_id.as_u32();