{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
        let iter_pat = self.alloc_pat_desugared(Pat::Bind { id: iter_binding, subpat: None });
            self.alloc_binding(iter_name, BindingAnnotation::Mutable, HygieneId::ROOT);
        self.add_definition_to_binding(iter_binding, iter_pat);