{
ExoContainer container = getContainer(httpSession.getServletContext());
ConversationRegistry conversationRegistry =
(ConversationRegistry)container.getComponentInstanceOfType(ConversationRegistry.class);
ConversationState conversationState = conversationRegistry.unregister(stateKey);
if (conversationState != null)
{
if (log.isDebugEnabled())
log.debug("Remove conversation state " + httpSession.getId());