Consider the Java program below. Choose an INVALID statement than cannot be added in the place of "// A line to be added" in the main method.

class testing {
    public final void m1() {
        System.out.println("Hey!");
    }
    public static void m2() {
        System.out.println("Salam sejahtera");
    }
}
public class Quiz2Q9 extends testing {
    public static void main(String[] args) {
        // A line to be added
    }