Provide a way to supress specific compiler message like TS2415, incorrectly extends base on override method with different return type

[gautamsi]

I am working on a code port from c# to TypeScript. Having some instance of overridden methods with new keyword in derived class. like following. Is there a way that I can suppress this instance of error TS2415.
I can live with error message as it does compile the file. It will have issues when I start putting build system around, they will show as failed all the time.

class parent{
public string testmethod(){return ""}
}
class child: parent{
public new int testmethod(){return 1;}
}

[danquirk]

See #2900