Conditional Validation: More then "when"

[tchari]

When is a great rule for a binary case. Is there a rule or way to do conditional validation if the conditional key value can have more than two outcomes? e.g.

    $cars = [
      ['manufacturer' => 'Honda', 'model' => 'Accord'],
      ['manufacturer' => 'Toyota', 'model' => 'Rav4'],
      ['manufacturer' => 'Ford', 'model' => 'notarealcar']
    ];
    Validator::arrayType()->each(
      Validator::key('manufacturer', Validator::in(['Honda', 'Toyota', 'Ford']))
      ->when(
        Validator::key('manufacturer', Validator::equals('Honda')),
        Validator::key('model', Validator::in(['Accord', 'Fit'])),
        Validator::when(
          Validator::key('manufacturer', Validator::equals('Toyota')),
          Validator::key('model', Validator::in(['Rav4', 'Camry'])),
          Validator::key('model', Validator::in(['F150', 'Bronco']))
        )
      )
    )->assert($cars);

This code works, but chaining 'when' gets a little cumbersome after a few 'manufacturers'. Is there some kind of switch-like rule?