sing <code>new BigDecimal(getString())</code>. This
 method should only called when the parser state is
 <a href="JsonParser.Event.html#VALUE_NUMBER"><code>JsonParser.Event.VALUE_NUMBER</code></a>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>BigDecimal</code> for a JSON number</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/IllegalStateException.html?is-external=true" title="class o