JavaPatternMatching/resources/AllgemeinTest/UseWildcardPair.jav

import java.util.Vector;
import java.lang.Boolean;

class UseWildcardPair{

    void m(Pair<?, ?> p, Vector<?> b)
    {
    	p.compare(p); //1, type incorrect
		p.compare(p.make(b)); //2, OK
    }

}