I am creating a dialog and I'm using the empty recycle bin dialog built into Umbraco as an example (code shown below, with some code removed for brevity): https://github.com/umbraco/Umbraco-CMS/blob/7c4a189aa3cf583954defd9c43a3e55e325f2c3f/src/Umbraco.Web.UI.Client/src/views/content/content.emptyrecyclebin.controller.js

function ContentEmptyRecycleBinController($scope, navigationService) {
    $scope.performDelete = function() {
        navigationService.hideMenu();
    };
    $scope.cancel = function() {
        navigationService.hideDialog();
    };
}

In that code, it calls navigationService.hideDialog when you click cancel, but it calls navigationService.hideMenu when you click OK. What's the difference between those two functions? The end result appears to be the same (i.e., the dialog closes).