api/java.base/java/util/Optional.html?is-external=true" title="class or interface in java.util" class="externalLink">Optional</a>&lt;org.apache.kafka.common.serialization.Serde&gt;&nbsp;getDefaultKeySerde()</pre>
<div class="block">Gets the default <code>Serde</code> configured for key.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>a optional <code>Serde</code> instance.</dd>
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