扑来，无法获取Firebase查询快照

Question

我从firebase获取数据并根据查询更新bool的数据。但是我的代码不起作用。 I tried printing the snapshots but I get "Instance of '_ControllerStream>>'" in the terminal how do I solve this.

Stream<QuerySnapshot<Map<String, dynamic>>>namees = await FirebaseFirestore
        .instance
        .collection('lender')
        .doc(auth.currentUser!.email)
        .collection('borrowers')
        .where('Name', isEqualTo: textfieldname).snapshots();
    print(namees);
    if (namees.isEmpty == true) {
      setState(() {
        isThere = true;
      });
    } else {
      setState(() {
        isThere = false;
      });
    }