Threading: optimize imports
@@ -20,13 +20,16 @@ import com.google.common.util.concurrent.CycleDetectingLockFactory;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.common.util.concurrent.Uninterruptibles;
-import org.bitcoinj.core.*;
+import org.bitcoinj.core.Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import javax.annotation.Nonnull;
import javax.annotation.Nullable;
-import java.util.concurrent.*;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.locks.ReentrantLock;
/**
