What is the difference between ^parentComponent or ^^parentComponent for require in AngularJS 1.5?
<p>There are references of using </p>

<pre><code>require: {
parent: '^^parent'
}
</code></pre>

<p>as well as </p>

<pre><code>require: {
parent: '^parent'
}
</code></pre>

<p>at different places. Haven't figured out the difference between the two.</p>