Add missing since tags.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1479399 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java

@@ -55,6 +55,7 @@ public class PredicatedBag<E> extends PredicatedCollection<E> implements Bag<E>
      * @return a new predicated Bag
      * @throws IllegalArgumentException if bag or predicate is null
      * @throws IllegalArgumentException if the bag contains invalid elements
+     * @since 4.0
      */
     public static <E> PredicatedBag<E> predicatedBag(final Bag<E> bag, final Predicate<? super E> predicate) {
         return new PredicatedBag<E>(bag, predicate);

src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java

@@ -54,6 +54,7 @@ public class PredicatedSortedBag<E> extends PredicatedBag<E> implements SortedBa
      * @return a new predicated SortedBag
      * @throws IllegalArgumentException if bag or predicate is null
      * @throws IllegalArgumentException if the bag contains invalid elements
+     * @since 4.0
      */
     public static <E> PredicatedSortedBag<E> predicatedSortedBag(final SortedBag<E> bag,
                                                                  final Predicate<? super E> predicate) {

src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java

@@ -45,6 +45,7 @@ public class SynchronizedBag<E> extends SynchronizedCollection<E> implements Bag
      * @param bag  the bag to decorate, must not be null
      * @return a new synchronized Bag
      * @throws IllegalArgumentException if bag is null
+     * @since 4.0
      */
     public static <E> SynchronizedBag<E> synchronizedBag(final Bag<E> bag) {
         return new SynchronizedBag<E>(bag);

src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java

@@ -45,6 +45,7 @@ public class SynchronizedSortedBag<E> extends SynchronizedBag<E> implements Sort
      * @param bag  the bag to decorate, must not be null
      * @return a new synchronized SortedBag
      * @throws IllegalArgumentException if bag is null
+     * @since 4.0
      */
     public static <E> SynchronizedSortedBag<E> synchronizedSortedBag(final SortedBag<E> bag) {
         return new SynchronizedSortedBag<E>(bag);

src/main/java/org/apache/commons/collections4/bag/TransformedBag.java

@@ -52,6 +52,7 @@ public class TransformedBag<E> extends TransformedCollection<E> implements Bag<E
      * @param transformer  the transformer to use for conversion, must not be null
      * @return a new transformed Bag
      * @throws IllegalArgumentException if bag or transformer is null
+     * @since 4.0
      */
     public static <E> Bag<E> transformingBag(final Bag<E> bag, final Transformer<? super E, ? extends E> transformer) {
         return new TransformedBag<E>(bag, transformer);

src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java

@@ -50,6 +50,7 @@ public class TransformedSortedBag<E> extends TransformedBag<E> implements Sorted
      * @param transformer  the transformer to use for conversion, must not be null
      * @return a new transformed SortedBag
      * @throws IllegalArgumentException if bag or transformer is null
+     * @since 4.0
      */
     public static <E> TransformedSortedBag<E> transformingSortedBag(final SortedBag<E> bag,
             final Transformer<? super E, ? extends E> transformer) {

src/main/java/org/apache/commons/collections4/bag/UnmodifiableBag.java

@@ -54,6 +54,7 @@ public final class UnmodifiableBag<E>
      * @param bag  the bag to decorate, must not be null
      * @return an unmodifiable Bag
      * @throws IllegalArgumentException if bag is null
+     * @since 4.0
      */
     public static <E> Bag<E> unmodifiableBag(final Bag<E> bag) {
         if (bag instanceof Unmodifiable) {

src/main/java/org/apache/commons/collections4/bag/UnmodifiableSortedBag.java

@@ -54,6 +54,7 @@ public final class UnmodifiableSortedBag<E>
      * @param bag  the bag to decorate, must not be null
      * @return an unmodifiable SortedBag
      * @throws IllegalArgumentException if bag is null
+     * @since 4.0
      */
     public static <E> SortedBag<E> unmodifiableSortedBag(final SortedBag<E> bag) {
         if (bag instanceof Unmodifiable) {