A non-null String must be provided to a Text widget. 'package:flutter/src/widgets/text.dart': Failed assertion: line 370 pos 10: 'data != null'

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予麋鹿
予麋鹿 2020-11-21 16:53

import \'package:cloud_firestore/cloud_firestore.dart\';

class ChatScreen extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( bo

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