ernal</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;writeExternal&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/ObjectOutput.html?is-external=true" title="class or interface in java.io" class="externalLink">ObjectOutput</a>&nbsp;os)
                   throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></pre>
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