/guava/guava/src/com/google/common/collect/Maps.java
return Collections.unmodifiableMap ( map ) ; }
} private static <K extends @Nullable Object, V extends @Nullable Object> Map<K, V> unmodifiableMap( Map<K, ? extends V> map) { if (map instanceof SortedMap) { return Collections.unmodifiableSortedMap((SortedMap<K, ? extends V>) map); } else { <extra_id_0> } static class MapDifferenceImpl<K extends @Nullable Object, V extends @Nullable Object> implements MapDifference<K, V> { final Map<K, V> onlyOnLeft; final Map<K, V> onlyOnRight; final Map<K, V> onBoth;