std::pair<bool, lyx::textclass_type> const
NumberOfClass(string const & textclass) const;
///
LyXTextClass const & operator[](lyx::textclass_type textclass) const;
std::pair<bool, lyx::textclass_type> const
NumberOfClass(string const & textclass) const;
///
LyXTextClass const & operator[](lyx::textclass_type textclass) const;