Review

class Utilities {
	/**
	 * Gets the keys of a Hashtable.
	 * Marked as deprecated, not used anywhere anymore.
	 * @param <K> type for the key
	 * @param <V> type for the value
	 * @param table
	 *            a Hashtable
	 * @return the keyset of a Hashtable (or an empty set if table is null)
	 */
	@Deprecated
	public static <K, V>  Set<K> getKeySet(final Hashtable<K, V> table) {
		return table == null ? Collections.<K>emptySet() : table.keySet();
	}

}