MutateBeforeSave with Standalone Forms, model(), and statePath()

public function form(Form $form): Form
{
    return $form
        ->schema([
            Checkbox::make('managed')
                ->reactive()
                ->afterStateUpdated(function (Set $set, $state) {
                    if ($state === false) {
                        $set('housing_locator', []);
                        $set('intermediaryContacts', []);
                    }
                }),
            Select::make('housing_locator')
                ->visible(fn($get) => $get('managed'))
                ->relationship('housingLocators', 'name')
                ->reactive()
                ->afterStateUpdated(function($set) {
                    // set contacts in repeater)
                }),
            Repeater::make('intermediaryContacts')
  ->relationship('intermediaryContacts'),
        ])
        ->statePath('data')
        ->model($this->property ?? Property::class);
}