Sorry, data for that comparison is no longer available.

function test(User $user, Post $post, Comment $comment, ChildUser $child): void
{
    assertType('Illuminate\Database\Eloquent\Relations\HasOne<Illuminate\Types\Relations\Address, Illuminate\Types\Relations\User>', $user->address());
    assertType('Illuminate\Types\Relations\Address|null', $user->address()->getResults());
    assertType('Illuminate\Database\Eloquent\Collection<int, Illuminate\Types\Relations\Address>', $user->address()->get());

<?php

namespace Illuminate\Types\Relations;

use Illuminate\Database\Eloquent\Model;