{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"Rc::make_mut(&mut"}]}
                    Rc::make_mut(&mut eof_mp.matches);
                    // Need to take ownership of the matches from within the `Rc`.
                    let matches = Rc::try_unwrap(eof_mp.matches).unwrap().into_iter();