private: void __thiscall QDateTime::detach(void)

Mangled name

?detach@QDateTime@@AAEXXZ

Exported by

size	filename	version
2499072	QtCore4.dll	4.8.4.0
4115936	Qt5Core_FSC_mod.dll	5.4.2.41
3864576	Qt5Core.dll	5.1.0.0