Cannot use factory magic methods with parent model

[ol1s]

When creating a model using a belongsTo factory relationship, there is the capability to use magic methods to explicitly define the relationship that we want to use.

Currently this only works by passing an array of state:

$posts = Post::factory()
    ->forUser([
        'name' => 'Jessica Archer',
    ])
    ->create();

However, it would be great to also accept an instance of the parent model:

$posts = Post::factory()
    ->forUser($user)
    ->create();

This would be useful for developers who are using the "magic method" approach who have multiple relationships for the same model, for example createdBy(User $user) and updatedBy(User $user)