code: public OperationFuture<List<Server>> reboot(ServerFilter serverFilter) {
          List<Server> serverList = findServers(serverFilter);
  
          return powerOperationResponse(
              serverList,
              "Reboot",
              client.reboot(ids(serverList))
          );
      }
docs: Reboot a single server or group of servers
  
  @param serverFilter search servers criteria
  @return OperationFuture wrapper for Server list