Infos about an argument / option an application can accept.
- Value parameters:
- extraNames:
extra names
- helpMessage:
help message for this argument (optional)
- isFlag:
if true, passing an actual value to this argument is optional
- name:
main name of the argument
- noHelp:
if true, this argument should not appear in help messages
- valueDescription:
description of its value (optional)
- Companion:
- object