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If service is not found, a null value is returned. If you want your application to fail if the service is not available, use requiredService(Class) method instead. The requiredService throws IllegalStateException if a service cannot be not found.

public class MyKuraRouter extends KuraRouter {

    @Override
    public void configure() throws Exception {
		MyService myService = requiredService(MyService.class);
        ...
    }

}

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