package p; import java.util.ArrayList; import java.util.List; import java.util.Set; /** * @see #zYXteg(List) */ interface I { Set<Set<Runnable>> zYXteg(List<Set<Runnable>> arg); } class Impl implements I { public Set<Set<Runnable>> zYXteg(List<Set<Runnable>> arg) { return null; } } class User { void call(I abc) { Set<Set<Runnable>> s= abc.zYXteg(new ArrayList<Set<Runnable>>()); } }