les/src-clients-messaging-api-lib-model-richmenuarea.html"><abbr title="src/clients/messaging-api/lib/Model/RichMenuArea.php">RichMenuArea.php</abbr></a></abbr>
    :
    <span class="phpdocumentor-element-found-in__line">375</span>

    </aside>

        <p class="phpdocumentor-summary">Returns true if offset exists. False otherwise.</p>

    <code class="phpdocumentor-code phpdocumentor-signature ">
    <span class="phpdocumentor-signature__visibility">public</span>
                    <span class="phpdoc