import com.google.common.util.concurrent.FluentFuture;
import com.google.common.util.concurrent.ListenableFuture;
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import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.UUID;
import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
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import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jdt.annotation.Nullable;
import org.opendaylight.mdsal.binding.api.DataBroker;