different 'select all' checkboxes for different lists of checkboxes, angularjs

On my page I have a three list of checkboxes. Each list has an own checkbox "select all". I do not want to increase code with duplicating lines, that's why I'm using the same function with parameter to select certain list of checkboxes

      $scope.selectAll = function(array) {
            angular.forEach(array, function(item) {
                 item.Selected = $scope.model.selectedAll;
             });
       };

html

   <input type="checkbox"
            ng-model="model.selectedAll" 
            ng-change="selectAll(categories)" >

It gives me desirable result, I can select all checkboxes in certain array. But here is the problem. $scope.model.selectedAll related to all lists and when I select all in one list, checkbox "select all" is checked in all lists.

I clearly understand this problem, I just don't have any idea how to resolve it. I have been thinking about creating of 3 different variables for each list but I'm using function with parameter, where array is unknown, so I cannot associate certain variable with it and it won't be working.

Is there any way to resolve this problem without duplicating code for particular list of checkboxes?

thanks in advance.

here is my plunker