In an API, is it possible not to route to native service and just return a response from API gateway itself without invoking the target system?

I am using SoftwareAG API Gateway. I see there are mandatory routing policy to be configured in an API. For one condition, I have a requirement not to route to native service and just return some response from API gateway itself. Is there a way to do it just like in Google Apigee platform (NoRoute). I see i can use custom extension and just put a custom variable and in this way avoid routing. Are there better ways to do this?

@mofarhan Refer the Mock features which is part of the API Gateway