Best way to null check in Kotlin?
<p>Should I use double <code>=</code>, or triple <code>=</code>?</p>

<pre><code>if(a === null)  {
//do something
}
</code></pre>

<p>or </p>

<pre><code>if(a == null)  {
//do something
}
</code></pre>

<p>Similarly for 'not equals':</p>

<pre><code>if(a !== null)  {
//do something
}
</code></pre>

<p>or </p>

<pre><code>if(a != null)  {
//do something
}
</code></pre>