How to use extends keyword of Java in Graphql

[KushagraBindal]

I am having a class Foo & Boo

public class Foo{
String a;
}
public class Boo extends Foo{
String b;
}

Boo will be my output object in .graphqls

I am able to get the response of Boo in this. But if I wanted to get the a also as the output of above query then how can we define the type and graphqls.

Is there any support present in dgs framework.