code: function(settings, callback) {
      "use strict";
  
      if (typeof settings === 'function') {
        callback = settings;
        settings = {};
      }
  
      if (typeof settings === 'undefined') {
        settings = {};
      }
  
      if (typeof callback !== 'function') {
        callback = function () {};
      }
  
      getLogFiles(function () {
        parseOptions(settings, function () {
          setupLogger();
  
          require('./Logger').verbose('Starting worker manager');
  
          // Start the Master
          master = require('./master');
  
          registerListeners(master);
  
          master.start();
  
          callback();
        });
      });
    }
docs: Start the Worker Manager
  
  @param [settings={}]
  @param [callback=function]