"https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a>s then resulting JSON object builder
 contains the key from the <code>map</code> only if the <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>Optional</code></a> is not empty.</div>
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<dt><