serif::dimensions::Energy serif::dimensions::PhysicalQuantity dimensions.hpp std::string_view std::string_view serif::dimensions::Energy::identifier identifier serif::dimensions::Energy::identifier = "energy" Dimension of Energy. serif::dimensions::Energy serif::dimensions::PhysicalQuantity serif::dimensions::Energy identifier serif::dimensions::PhysicalQuantity std::basic_string_view< Char > std::string_view serif::dimensions::Energyidentifier