///
std::string const getBabelOptions() const;
/// The definitions needed by the document's textclass
docstring const getTClassPreamble() const;
/// The language dependent definitions needed by the document's textclass
docstring const getTClassI18nPreamble(bool use_babel) const;
///
std::string const getBabelOptions() const;
/// The definitions needed by the document's textclass
docstring const getTClassPreamble() const;
/// The language dependent definitions needed by the document's textclass
docstring const getTClassI18nPreamble(bool use_babel) const;