template<class F, class T1, class T2, class T3, class T4>
template<class U1 = mpl::none, class U2 = mpl::none, class U3 = mpl::none, class U4 = mpl::none, class U5 = mpl::none>
struct Sacado::mpl::bind4< F, T1, T2, T3, T4 >::apply< U1, U2, U3, U4, U5 >