pub fn flag_present(&self, arg_name: &'static str) -> bool {
        match self.value_of(arg_name) {
            Some(v) => v.as_flag(),
            None => false,
        }
    }
/// Return whether an `arg_name` argument of type flag exists.
Return whether an `arg_name` argument of type flag exists.
Return whether an ` arg_name ` argument of type flag exists .
pub fn flag_present(&self, arg_name: &'static str) -> bool {
        match self.value_of(arg_name) {
            Some(v) => v.as_flag(),
            None => false,
        }
    }
pub fn flag_present ( & self , arg_name : & ' static str ) -> bool { match self . value_of ( arg_name ) { Some ( v ) => v . as_flag ( ) , None => false , } }
Return whether an `arg_name` argument of type flag exists.
Return whether an ` arg_name ` argument of type flag exists .
&self
arg_name
&'static str
&self
arg_name
&'static str