{"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
    let mut add_opt = |runnable: Option<Runnable>, def| {
    let mut in_macro_expansion = FxIndexMap::<hir::HirFileId, Vec<Runnable>>::default();
        if let Some(runnable) = runnable.filter(|runnable| runnable.nav.file_id == file_id) {