      }
  
      /**
-@@ -167,11 +169,23 @@
+@@ -179,11 +181,23 @@
       * @param container the container containing the items
       * @param itemId the ID of the item containing the property
       * @return property, or null if not found

     /**
      * Add a property represented by this instance to the given {@link Container}.
      *
@@ -191,7 +205,7 @@
      * @return true if the operation succeeded, false if not
      * @throws UnsupportedOperationException if the operation is not supported
      */

  * </pre></blockquote>
  *
  * @param <T> property's value type
@@ -168,9 +168,11 @@
      * Get the property that this instance represents from the given {@link Item}.
      *
      * @return property, or null if not found
