main.dart

import 'dart:async';
import 'dart:convert';

void main() {
  Future<String> queryOne() async {
    return "[1,2,3]";
  }

  Future<String> queryTwo() async {
    return "{\"test\":true}";
  }

  T parseJson<T>(String resp) {
    const json = const JsonCodec();

      return json.decode(resp);
  }

 
  // THIS IS COMPILING
  Future<Map<String, dynamic>> isCompiningOk() {
    return queryOne().then(parseJson);
  };
  

  
  // THIS IS NOT
  queryOne().then(parseJson).then((Map<String, dynamic> onValue) {
    return 1;
  });

  for (int i = 0; i < 5; i++) {
    print('hello ${i + 1}');
  }
}