an class="returnLabel">Returns:</span></dt>
<dd>the boolean value at the specified position,
 or the specified default value</dd>
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<h4>isNull</h4>
<pre class="methodSignature">boolean&nbsp;isNull&#8203;(int&nbsp;index)</pre>
<div class="block">Returns <code>true</code> if the value at the specified location in this
 array is <code>JsonValue.NULL</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:<