r-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span>&nbsp;<span class="element-name">onPut</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;key,
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