#if 0 && !defined(QT_NO_DEBUG) && !defined(QT_NO_DEBUG_OUTPUT)
# define quickLayoutDebug QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).debug
#else
# define quickLayoutDebug QT_NO_QWARNING_MACRO
# define quickLayoutDebug QT_NO_QDEBUG_MACRO
#endif
class QQuickLayoutPrivate;