code: function setupClients(clientList, mixinConf) {
      var i, len, cache;
  
      cache = {};
  
      // Resolve special values of clientList.
      if ('string' === typeof clientList) {
          switch (clientList) {
          case 'all':
              clientList = this.clients.id.getAllKeys();
              break;
  
          case 'players':
              clientList = this.clients.player.id.getAllKeys();
              break;
  
          case 'admins':
              clientList = this.clients.admin.id.getAllKeys();
              break;
          }
      }
  
      // Setup all given clients.
      i = -1, len = clientList.length;
      for ( ; ++i < len ; ) {
          this.setupClient(clientList[i], mixinConf, cache);
      }
  }
docs: ## setupClients
  
  Instantiates and setups a number of clients of the game room
  
  @param {string|object} clientList The list of clients or a string
  specifying which clients are to be setup (Accepted values:
  'all', 'players', or 'admins')
  @param {object} mixinConf
  Optional. Additional options to mixin with the instantiated client
  type.
  
  @see GameRoom.getClientType
  @see GameRoom.node