Load all relations and their children in Laravel
<p>I have a rather complex structure that contains multiple relations. If my relations are defined this way, how can I load all of them in one call?</p>

<pre><code>Model
    (has many) ChildModels1
        Child1a
        Child1b
        ...
    (has many) ChildModels2
        Child2a
        Child2b
        ...
    (has many) ChildModels3
        Child3a
        Child3a
            Child3aa
            Child3ab
            ...
</code></pre>

<p>I'm able to do the following: </p>

<pre><code>$entity = Entity::find($id)-&gt;load('ChildModels1', 'ChildModels2', 'ChildModels3');
</code></pre>

<p>But I'm not sure how to load all the child relations too. </p>