docs: function(signal)
      {
          return new Promise( resolve =>
          {
              for (let uniqueID in cluster.workers)
              {
                  if (cluster.workers.hasOwnProperty(uniqueID))
                  {
                      const worker = cluster.workers[uniqueID];
  
                      worker.kill(signal);
                  }
              }
  
              resolve();
          });
      }