Function beginPhase

tools/ngui/static/js/lib/angular.js:8332–8338

(phase)

    function beginPhase(phase) {
      if ($rootScope.$$phase) {
        throw Error($rootScope.$$phase + ' already in progress');
      }

      $rootScope.$$phase = phase;
    }

    function clearPhase() {
      $rootScope.$$phase = null;