{"ast_node_type":"variable","tokens":[{"end":45,"kind":"keyword","start":0,"text":"let"}]}
        let file_id = local_file_id.as_u32();
        let &Self { start_line, start_col, end_line, end_col } = self;
        ffi::CoverageSpan { file_id, start_line, start_col, end_line, end_col }