{"ast_node_type":"variable","tokens":[{"end":47,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(body_id) = node.body_id() {
        let node = tcx.hir_node_by_def_id(def_id);
            tcx.arena.alloc_from_iter(tcx.hir_body_param_idents(body_id))