Whats the name of the pattern to conform to the Open/Closed principle

Starting with a simple super class

public class MySuperSearch {
    private Data myData;
}

By default we are showing something on screen, based on myData, we are also using myData in other methods. One team had a specific use case where it made sense to reuse this classes functionality except showing that item on screen.

He did this

public class MySuperSearch {
    protected Data myData; //changed access rights
}

public class MySubSearch {

    public MySubSearch() {
        ....
        myData = null; //has side effects
    }

}

We all had a discussion about this and agreed we should be allowing extension to change behaviour, but not modification like above.

So the solution is something like the following

public class MySuperSearch {
    private Data myData;

    protected boolean isMyDataDisplayed() {
        return true;
    }
}

public class MySubSearch {
    @Override
    protected boolean isMyDataDisplayed() {
        return false;
    }
}

My question is what is the name of this pattern, so we can more concisely explain in the future?