f5d6bae117
- There's been no explicit support having argument void type as you would not be able to use with annotation model but surely can be wrapped as Type with CommandRegistration. - For now change CommandInfoModel so that it uses empty string which is i.e. expected in help options which are just used as flags. - It's outside of this commit to change parser to fail if user gives an argument value for this type of options. - Fixes #586