use std::cell::RefCell;
use std::rc::Rc;

struct Foo {
    bar: Rc<RefCell<Option<String>>>,
}

impl Foo {
    fn baz(&self) {
        self.bar.borrow().as_ref().map(|f| println!("{:?}", f)); // This should print the Option<T>
    }
}


fn main() {
    let foo = Foo { bar: Rc::new(RefCell::new(None)) };
}