Creating enums from serialized values is done like so:
$status = new StatusEnum('draft');
When an enum value doesn't exist, you'll get an error.
Also keep in mind that the core philosophy of this package is that you should never use the enum value directly in your code. Always use the object itself. The only place where you're allowed to use Enum::make() is to unserialise a value into an enum object. One example is to convert a stored value in a database to an enum object.
If you want to get the value of an enum to store it, you can do this:
$status->value;
Note that value is a read-only property, it cannot be changed.