Call super method of super class from child class

Question

I have an abstract class A:

abstract class A {
    Future<String> firstMethod();
}

and I implemented this abstract class:

class Aimp implements A {
  @override
  Future<String> firstMethod() async {
      return "test";
  }
}

I have created another abstract class:

abstract class B extends A {
  
    Future<String> secondMethod();
}

and I implemented this abstract class:

class Bweb extends B {
    @override
      Future<Object> secondMethod() async {
          final t = //I want to call firstMethod()
         if(t.isNotEmpty()) // do sth
    }
}

In the implementation of secondMethod(), how can I call the implementation of firstMethod()?

I don't want to use mixin.

Answer 1

I try to use with instead:

abstract class A {
    Future<String> firstMethod();
}

class Aimp implements A {
  @override
  Future<String> firstMethod() async {
      return "test";
  }
}

abstract class B with Aimp {
    Future<String> secondMethod();
}

class Bweb extends B {
  
    @override
    Future<String> secondMethod() async {
         final String t = await firstMethod(); //Your firstMethod function
         if(t.isNotEmpty) {
           return t;
         }
      return '';
    }
}