137 pub struct Argument {  struct
141     pub value_mode: ArgumentValueMode,  argument
150 impl Argument {  argument
151     pub fn positional(value: &'static str, help: &'static str) -> Argument {  in positional()
161     pub fn value(long: &'static str, value: &'static str, help: &'static str) -> Argument {  in value()
176     ) -> Argument {  in short_value()
186     pub fn flag(long: &'static str, help: &'static str) -> Argument {  in flag()
196     pub fn short_flag(short: char, long: &'static str, help: &'static str) -> Argument {  in short_flag()
206     pub fn flag_or_value(long: &'static str, value: &'static str, help: &'static str) -> Argument {  in flag_or_value()
327 pub fn set_arguments<I, R, F>(args: I, arg_list: &[Argument], mut f: F) -> Result<()>  in set_arguments()
365 pub fn print_help(program_name: &str, required_arg: &str, args: &[Argument]) {  in print_help()