code: function() {
      var deferred = $q.defer();
  
      var current = $state.current();
  
      // Evaluate
      if(current) {
        var sources = (typeof current.load === 'string' ? [current.load] : current.load) || [];
        
        // Get promises
        $q.all(sources
          .map(function(src) {
            return _createLoadable(src);
          })
          .filter(function(loadable) {
            return !loadable.isComplete;
          })
          .map(function(loadable) {
            return loadable.promise;
          })
        )
            .then(function() {
              deferred.resolve();
  
            }, function(err) {
              $rootScope.$broadcast('$loadableError', err);
              deferred.reject(err);
            });
  
      // No state
      } else {
        deferred.resolve();
      }
  
      return deferred.promise;
    }
docs: Load all required items
  
  @return {Promise} A promise fulfilled when the resources are loaded