title="interface in jakarta.json">JsonObject</a>&gt;</code></td>
<th class="colSecond" scope="row"><span class="typeNameLabel">JsonCollectors.</span><code><span class="memberNameLink"><a href="../stream/JsonCollectors.html#groupingBy(java.util.function.Function,java.util.stream.Collector)">groupingBy</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function" class="externalLink">F