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<pre class="methodSignature">public&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Future</a>&lt;org.apache.kafka.streams.KafkaStreams.State&gt;&nbsp;start&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Executor.html?is-external=true" title="class or interface in java