title: Angular JS - multiple ng-grid in one controller : Master /detail
body: <p>All of the examples that I can find of <code>ng-grid Mater/Detail</code>, such as the official demo at <a href="http://angular-ui.github.io/ng-grid/" rel="nofollow">http://angular-ui.github.io/ng-grid/</a>  do show Master / Detail, <strong>but</strong> they don't show it with two ng-grids.</p>
  
  <p>How can I do that? I don't even know how to start. It looks like the grid is bound to <code>$scope.gridOptions</code> and <code>$scope</code> is bound to controller, so I don't see how to have two ng-grids in one controller.</p>
  
  <p>Does that mean I need two controllers (connected by a service)?</p>