EarlyExit
Parsing signalled an early exit. This means that there wasn't an error,
but that not all arguments were parsed. This occurs if one of the
arguments requested an early exit after some side-effect (for example,
--help will print a help message and then signal an early exit).
Arguments are not available.
trait Singleton
trait Product
trait Mirror
trait Serializable
trait Product
trait Equals
trait ParseResult
class Object
trait Matchable
class Any