VSL import.
class vtb::vsl::Description
class vtb::vsl::Name
operator<<(std::ostream & out, const Name & rhs) -> std::ostream &
operator<<(std::ostream & out, const Description & rhs) -> std::ostream &
operator>>(std::istream & in, Name & rhs) -> std::istream &
operator>>(std::istream & in, Description & rhs) -> std::istream &
to_string(const Description & rhs) -> const std::string &