n-value__heading">Return values</h5>
    <span class="phpdocumentor-signature__response_type">array&lt;string|int, mixed&gt;</span>
            &mdash;
        
    
</article>
                    <article
        class="phpdocumentor-element
            -method
            -public
                                    -static                    "
>
    <h4 class="phpdocumentor-element__name" id="method_openAPITypes">
        openAPITypes()
        <a href="classes/LINE-Webhook-Model-FollowDetail.html#method_