void (String[] args) { Collection unmodifiableCollection = ((Collections.emptyList())); List unmodifiableList = ((Collections.emptyList())); Set unmodifiableSet = ((Collections.emptySet())); Map unmodifiableMap = ((Collections.emptyMap())); SortedSet unmodifiableSortedSet = ((Collections.emptySet())); SortedMap unmodifiableSortedMap = ((Collections.emptyMap())); NavigableSet unmodifiableNavigableSet = ((Collections.emptySet())); NavigableMap unmodifiableNavigableMap = ((Collections.emptyMap())); }