-import org.asamk.signal.util.Util;
-import org.whispersystems.signalservice.api.util.InvalidNumberException;
+import org.asamk.signal.manager.api.NotMasterDeviceException;
+import org.asamk.signal.manager.api.UnregisteredRecipientException;
+import org.asamk.signal.manager.groups.GroupNotFoundException;
+import org.asamk.signal.output.OutputWriter;
+import org.asamk.signal.util.CommandUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+public class BlockCommand implements JsonRpcLocalCommand {