="type-annotation">String</span> <span class="parameter-name">contentType</span></span>)
                    &#8594;
                    <span class="returntype">bool</span>
                </span>
            </dt>
            <dd>
                
            </dd>
        </dl>
    </section>

    <section class="summary" id="instance-properties">
        <h2>Properties</h2>

        <dl class="properties">
            <dt id="keySystem" class="property">
                <span class="top-level-variable-t