// FOR bbtk WINDOWS CREATION/DESTRUCTION OBSERVATION
// BBTKWXSIG
-//EED 2020-04-21
+//EED 2020-03-17
//#include <boost/signal.hpp>
#include <boost/signals2/signal.hpp>
//EED 2020-04-21
// typedef boost::signals::trackable SignalObserver;
// typedef boost::signal<void ()> Signal_type;
+
typedef boost::signals2::trackable SignalObserver;
typedef boost::signals2::signal<void ()> Signal_type;