docs: function(pack) {
      if (cluster.isMaster) {
        if (pack.toWorkers === true) {
          for (var key in cluster.workers) {
            cluster.workers[key].send(pack)
          }
        }
      }
      else {
        if (pack.toMaster === true || pack.toWorkers === true) {
          process.send(pack)
        }
      }
    }