When Rust doesn't allow you to unwrap an Option, use .as_ref().
Unwrapping &Option<Foo> causes "cannot move out of borrowed content" error, because it assumes you want to take exclusive ownership of Foo, destroying the Option in the process, and that's not allowed through a reference.
option.as_ref() flips it inside-out to become an owned option holding a reference Option<&Foo>. Then unwrap() will get a shared reference rather than take ownership, which is fine.
Try it: Rust Playground