The argument type 'Map Function()' can't be assigned to the parameter type 'Map'

Question

This could initially was working but after firebase update, it is now giving me this error. I have added asterisks to the part giving the error. The error message has been

Answer 1

Try the following:

  Record.fromSnapshot(DocumentSnapshot snapshot)
      : this.fromMap(snapshot.data(), reference: snapshot.reference);

data() is a method:

  /// Contains all the data of this [DocumentSnapshot].
  Map data() {
    return _CodecUtility.replaceDelegatesWithValueInMap(
        _delegate.data(), _firestore);
  }

that returns a Map