Laravel Check If Relationship has Loaded or Not

One of the nice things of Larave is eager loading. Now, sometimes if you need to check whether the model has loaded the eager loading or not, then you need to check with relationLoaded().

Here is my original code.

$users = App\User::with('profile')->first();

Now, I want to check whether $user load the relationship profile or not.

$users = App\User::with('profile')->first();

if ($users->relationLoaded('posts')) {
    // yes, it has been loaded
    // now, place your logic here
}