<mp-units/framework/quantity.h>
template<
RepresentationOf<quantity_spec> ToRep,
/* implementation-defined */ ToU>
requires std::constructible_from<ToRep, rep> && detail::SaneScaling<unit, ToU{}, rep>
[[nodiscard]]
constexpr
QuantityOf<quantity_spec> auto
force_in(ToU) const;