template <typename ForwardIt, typename Size, typename T>
constexpr inline ForwardIt find_consecutive(ForwardIt first, ForwardIt last, Size count, const T& val);
template <typename ForwardIt, typename Size, typename UnaryPredicate>
constexpr inline ForwardIt find_consecutive_if(ForwardIt first, ForwardIt last, Size count, UnaryPredicate p);
multidim::find_consecutive is equivalent to multidim::search_n (operator== version).
multidim::find_consecutive_if takes a unary predicate instead of using operator== to compare to val. It is similar to std::search_n (binary predicate version), but multidim::find_consecutive_if uses a unary predicate instead.