gistfile1.js

  clients:function() {
    var bl = this.get('broadcastLocation');
    if(!bl) return null;
    var surfaces = bl.getPath('screenLayout.surfaces');

    var clients = [];
    surfaces.forEach(function(surface) {
      console.log(surface.toString());
      //console.log(surface.get('client'));
      clients.pushObject(surface.get('client'));
    });
    console.log(clients);
    return clients;
  }.property('broadcastLocation').cacheable(),