inline static
typename std::enable_if<ExpansionTraits<Expansion>::has_vector_M2T>::type
apply(const Expansion& K,
const typename Expansion::multipole_type& M,
const typename Expansion::point_type& center,
TargetIter t_begin, TargetIter t_end, ResultIter r_begin) {
K.M2T(M, center, t_begin, t_end, r_begin);
}
inline static
typename std::enable_if<ExpansionTraits<Expansion>::has_scalar_M2T &
!ExpansionTraits<Expansion>::has_vector_M2T>::type
apply(const Expansion& K,
const typename Expansion::multipole_type& M,
const typename Expansion::point_type& center,
const typename Expansion::target_type& target,
typename Expansion::result_type& result) {
K.M2T(M, center, target, result);
}
