src/net/java/sip/communicator/impl/muc/MUCServiceImpl.java
/**
     * Goes through the locally stored chat rooms list and for each
     * {@link ChatRoomWrapper} tries to find the corresponding server stored
     * {@link ChatRoom} in the specified operation set. Joins automatically all
     * found chat rooms.
     *
     * @param protocolProvider the protocol provider for the account to
     * synchronize
     * @param opSet the multi user chat operation set, which give us access to
     * chat room server
     */
Goes through the locally stored chat rooms list and for each
ChatRoomWrapper tries to find the corresponding server stored
ChatRoom in the specified operation set. Joins automatically all
found chat rooms.

@param protocolProvider the protocol provider for the account to
synchronize
@param opSet the multi user chat operation set, which give us access to
chat room server
Goes through the locally stored chat rooms list and for each ChatRoomWrapper tries to find the corresponding server stored ChatRoom in the specified operation set . Joins automatically all found chat rooms . @param protocolProvider the protocol provider for the account to synchronize @param opSet the multi user chat operation set which give us access to chat room server
public void synchronizeOpSetWithLocalContactList(
        ProtocolProviderService protocolProvider,
        final OperationSetMultiUserChat opSet)
    {
        ChatRoomProviderWrapper chatRoomProvider
            = findServerWrapperFromProvider(protocolProvider);
        if(chatRoomProvider == null)
        {
            chatRoomProvider = chatRoomList.addRegisteredChatProvider(protocolProvider);
        }
        if (chatRoomProvider != null)
        {
            chatRoomProvider.synchronizeProvider();
        }
    }
public void synchronizeOpSetWithLocalContactList ( ProtocolProviderService protocolProvider , final OperationSetMultiUserChat opSet ) { ChatRoomProviderWrapper chatRoomProvider = findServerWrapperFromProvider ( protocolProvider ) ; if ( chatRoomProvider == null ) { chatRoomProvider = chatRoomList . addRegisteredChatProvider ( protocolProvider ) ; } if ( chatRoomProvider != null ) { chatRoomProvider . synchronizeProvider ( ) ; } }
Goes through the locally stored chat rooms list and for each
 {@link ChatRoomWrapper} tries to find the corresponding server stored
 {@link ChatRoom} in the specified operation set.
Goes through the locally stored chat rooms list and for each { @link ChatRoomWrapper } tries to find the corresponding server stored { @link ChatRoom } in the specified operation set .