The help text to be displayed to the user when --help is passed.
This may be a string, which will be presented directly, or a function, which will be called with an TranslationProxy so that option help can be translated into the user specified locale.
The option name.
The parameter type, used to convert user configuration values into the expected type. If not set, the type will be a string.
Optional
configIf set, this option will be omitted from --help
, and attempting to specify it on the command
line will produce an error.
All of the possible flags, with their default values set.