serif::dimensions::Time serif::dimensions::PhysicalQuantity dimensions.hpp std::string_view std::string_view serif::dimensions::Time::identifier identifier serif::dimensions::Time::identifier = "time" Dimension of Time. serif::dimensions::PhysicalQuantity serif::dimensions::Time serif::dimensions::PhysicalQuantity serif::dimensions::Time identifier std::basic_string_view< Char > std::string_view serif::dimensions::Timeidentifier