Returns an unmodifiable view of the specified sorted set. Query operations on the returned sorted set "read through" to the specified sorted set. Attempts to modify the returned sorted set, whether direct, via its iterator, or via its subSet, headSet, or tailSet views, result in an UnsupportedOperationException.

The returned sorted set will be serializable if the specified sorted set is serializable.

Parameters:

<T>		the class of the objects in the set
s		the sorted set for which an unmodifiable view is to be returned.

Returns:  an unmodifiable view of the specified sorted set.