Extending an instance

$container->extend(string $id, Closure $callback): object

Parameters	Type	Description
`$id`	`string`	Name of the existing service
`$callback`	`Closure`	callback function

Usage

This handy method will allow you to extend the functionality of existing entry.

$container->set('db', function (Config $config) {
    return new Database($config);
});

$container->set(SomeDriver::class, function (Config $config) {
    return new MyDriver($config);
});

$container->extend('db', function (Database $db, SomeDriver $driver): Database {
    $db->addDriver($driver);

    return $db;
});

NOTE :

This method should only works if the returns type of the entry ($id) is an object, otherwise it will throw an error.
The 1st argument of the callback is always the instance of the entry ($id), and the other arguments is the value from another entries.
The callback should returns the same instance as the 1st argument of the callback.