{"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"let"}]}
        let mod_id = self.tcx.parent_module(expr.hir_id).to_def_id();
        // try to add a suggestion in case the field is a nested field of a field of the Adt
        let (ty, unwrap) = if let ty::Adt(def, args) = base_ty.kind()