rem: _in_expander = do_expander; _subr_level = 0;
add: _in_subr = in_subr; _in_prefix = do_prefix; _subr_level = (fresh ? 0 : 1);
context: Type1OneMMRemover::run(const Type1Charstring &cs, bool do_expander){  _expander_gen.clear();  _main_gen.clear();  _in_expander = do_expander;  _subr_level = 0;  _must_expand = false;  init();    cs.run(*this);    return _must_expand;}