code: function (description, args, type) {
      var name = args.shift();
      this.internals.argv.describe(name, description);
  
      for (var i = 0; i < args.length; ++i) {
        this.internals.argv.alias(args[i], name);
      }
  
      switch (type) {
        case 'string':
          this.internals.argv.string(name);
          break;
  
        case 'boolean':
          this.internals.argv.boolean(name);
          break;
  
        default:
          return false;
      }
  
      return true;
    }
docs: Add a configuration option to dbmigrate.
  
  @return boolean