| 1043 | } |
| 1044 | |
| 1045 | private static <E> Set<E> removeOnlySet(final Set<E> set) { |
| 1046 | return new ForwardingSet<E>() { |
| 1047 | @Override |
| 1048 | protected Set<E> delegate() { |
| 1049 | return set; |
| 1050 | } |
| 1051 | |
| 1052 | @Override |
| 1053 | public boolean add(E element) { |
| 1054 | throw new UnsupportedOperationException(); |
| 1055 | } |
| 1056 | |
| 1057 | @Override |
| 1058 | public boolean addAll(Collection<? extends E> es) { |
| 1059 | throw new UnsupportedOperationException(); |
| 1060 | } |
| 1061 | }; |
| 1062 | } |
| 1063 | |
| 1064 | private static <E> SortedSet<E> removeOnlySortedSet(final SortedSet<E> set) { |
| 1065 | return new ForwardingSortedSet<E>() { |