// Mutable pointer to the field.

// If field is not initialized, it is initialized with default value first.

pub fn mut_message(&mut self) -> &mut ::std::string::String {

        &mut self.message

}

=========

Geez, this is ugly.

And here's another..

=========

// Take field

pub fn take_message(&mut self) -> ::std::string::String {

        ::std::mem::replace(&mut self.message, ::std::string::String::new())

}