private: int __thiscall UClass::IsA(class UClass *)const

Mangled name

?IsA@UClass@@ABEHPAV1@@Z

Exported by

size	filename	version
953304	Core.dll
1010880	Core.dll
1372180	Core.dll
1372180	Core.dll
1372180	Core.dll

Imported by

size	filename
8347648	nwindow.dll
8147968	Engine.dll