/**
\class QxtNullable QxtNullable
-\ingroup core
+\ingroup QxtCore
\brief distinct null value compatible with any data type.
in general it's a templated abstraction to allow any data type to be
#include <qxtnull.h>
template<typename T>
-class QXT_CORE_EXPORT QxtNullable
+class /*QXT_CORE_EXPORT*/ QxtNullable
{
public:
QxtNullable(QxtNull);