+ /// Returns latexargs() + postcommandargs() + itemargs().
+ /// But note that it returns a *copy*, not a reference, so do not do
+ /// anything like:
+ /// Layout::LaTeXArgMap::iterator it = args().begin();
+ /// Layout::LaTeXArgMap::iterator en = args().end();
+ /// Those are iterators for different containers.
+ LaTeXArgMap args() const;