{"ast_node_type":"variable","tokens":[{"end":41,"kind":"keyword","start":0,"text":"let"}]}
        let is_used_in_input = |def_id| {
        let fn_sig = self.tcx.hir_get_if_local(self.def_id).and_then(hir::Node::fn_sig);
            fn_sig.is_some_and(|fn_sig| {