Sample code to have Dart object print its fields

main.dart

class A {
  int? i1;
  int? i2;
  
  A({this.i1, this.i2});
}

class B {
  int? i1;
  int? i2;
  
  B({this.i1, this.i2});
  
  toString() {
    return 'i1: $i1, i2: $i2';
  }
}


void main() {
  A a = A(i1: 10, i2: 20);
  B b = B(i1: 10, i2: 20);
  print(a);
  print(b);
}