pub fn add_argument(self, arg: &Marshal) -> Self {
        Message {
            message: self.message.add_arg(arg),
        }
    }
/// Add an argument to the message.
Add an argument to the message.
Add an argument to the message .
pub fn add_argument(self, arg: &Marshal) -> Self {
        Message {
            message: self.message.add_arg(arg),
        }
    }
pub fn add_argument ( self , arg : & Marshal ) -> Self { Message { message : self . message . add_arg ( arg ) , } }
Add an argument to the message.
Add an argument to the message .
self
arg
&Marshal