var opt_help = new OptionBool("Show this help message", "-h", "--help")
var opts = new OptionContext
-opts.add_option(opt_help, opt_output)
+opts.add_option(opt_help, opt_output, opt_init_as_methods)
opts.parse(args)
if opts.errors.not_empty or opts.rest.is_empty or opt_help.value then
v.enter_visit root
end
-g.generator v.model.classes
+g.generate v.model.classes