Bummer! This is just a preview. You need to be signed in with an account to view the entire instruction.
The setter method, called out(), should receive one argument (this can also be called out, or any other variable name that makes sense to you). This argument is the value that the _out backing property will be set to - true or false. The Book object either is, or isn’t checked out.
This setter method is also meant to calculate the Book’s due d...