import java.util.*;
public class Test{
	public static void main(String[] args){
		Collections.sort(new ArrayList());
		System.out.println("Main:" + amIFoo() );
		foo();
	}

	static void foo(){
		System.out.println("Foo: " + amIFoo() );
	}
	static boolean amIFoo(){
		Throwable t = new Throwable();
		StackTraceElement[] trace = t.getStackTrace();
		String methodName =trace[1].getMethodName();
		return methodName.equals("foo");
	}
}