Is your feature request related to a problem?

When trying to insert relationships into models via a service provider, it is not possible because the mongo specific methods are protected. Laravel has these methods public for this reason.

Describe the solution you'd like

Swap out protected for public methods

Describe alternatives you've considered

Other than forking the package I don't see a work around.
I could create a public method on the target model which then returns the protected on, however this feels rather hacky and creates requirements on a third party package.

Additional context

Inserting a relationship via the service provider is not the most well documented features, but it is usefully for being able to decouple packages and works as follows:

public function boot(): void
{
    Parent::resolveRelationUsing('children', function ($parent) {
        return $parent->hasMany(Child::class);
    });
}