Partial Rendering problem with Richfaces 4

Partial rendering problem when integrating Web Flow with Richfaces 4.

As described here (http://community.jboss.org/message/610573#610573) , it appears FlowPartialViewContext.getRenderIds() returns an immutable collection , but reference states this collection should be mutable :

/**

• <p class="changed_added_2_0">Return a
• <code>Collection</code> of client identifiers from the current request
• with the request parameter name {@link #PARTIAL_RENDER_PARAM_NAME}

  .

• If there is no such request parameter, return an empty <code>Collection</code>.
• These client identifiers are used to identify components that
• will be processed during the <code>render</code> phase of the
• request processing lifecycle. The returned <code>Collection</code> is
• mutable.</p>
  *
• @throws IllegalStateException if this method is called after
• this instance has been released
  *
• @since 2.0
  */
  public abstract Collection<String> getRenderIds();