//////////////////////////////////////////////////////////////////////////
    void RouterButtonEventReceiver::addButtonEventReceiver( const ConstString & _state, const ButtonEventReceiverInterfacePtr & _button )
    {
        ButtonEventReceiverInterfacePtr delreceiver = m_receivers.change( _state, _button );

        MENGINE_UNUSED( delreceiver );

        MENGINE_ASSERTION_FATAL( delreceiver == nullptr );
    }
    //////////////////////////////////////////////////////////////////////////
    ButtonEventReceiverInterfacePtr RouterButtonEventReceiver::removeButtonEventReceiver( const ConstString & _state )
    {
        ButtonEventReceiverInterfacePtr delreceiver = m_receivers.erase( _state );

        MENGINE_ASSERTION_FATAL( delreceiver != nullptr );

        return delreceiver;
    }