;: array&lt;string|int, mixed&gt;            </span>
</dt>
<dd>Array of nullable properties. Used for (de)serialization</dd>

            <dt class="phpdocumentor-table-of-contents__entry -property -protected">
    <a href="classes/LINE-Clients-MessagingApi-Model-RichMenuListResponse.html#property_openAPINullablesSetToNull">$openAPINullablesSetToNull</a>
    <span>
                        &nbsp;: array&lt;string|int, mixed&gt;            </span>
</dt>
<dd>If a nullable field gets set to null, insert it here