How to use the ember-runtime/system/native_array.A function in ember-runtime

init() {
    this._super(...arguments);

    // setup child views. be sure to clone the child views array first
    // 2.0TODO: Remove Ember.A() here
    this.childViews = emberA(this.childViews.slice());
    this.ownerView = this.ownerView || this;
  },

groupedContent: computed('optionGroupPath', 'content.[]', function() {
    var groupPath = get(this, 'optionGroupPath');
    var groupedContent = emberA();
    var content = get(this, 'content') || [];

    content.forEach((item) => {
      var label = get(item, groupPath);

      if (get(groupedContent, 'lastObject.label') !== label) {
        groupedContent.pushObject({
          label: label,
          content: emberA()
        });
      }

      get(groupedContent, 'lastObject.content').push(item);
    });

    return groupedContent;

content.forEach((item) => {
      var label = get(item, groupPath);

      if (get(groupedContent, 'lastObject.label') !== label) {
        groupedContent.pushObject({
          label: label,
          content: emberA()
        });
      }

      get(groupedContent, 'lastObject.content').push(item);
    });

replace(idx, removedCount, addedViews) {
    var addedCount = addedViews ? get(addedViews, 'length') : 0;
    var self = this;
    Ember.assert("You can't add a child to a container - the child is already a child of another view", emberA(addedViews).every(function(item) { return !item._parentView || item._parentView === self; }));

    this.arrayContentWillChange(idx, removedCount, addedCount);
    this.childViewsWillChange(this._childViews, idx, removedCount);

    if (addedCount === 0) {
      this._childViews.splice(idx, removedCount);
    } else {
      var args = [idx, removedCount].concat(addedViews);
      if (addedViews.length && !this._childViews.length) { this._childViews = this._childViews.slice(); }
      this._childViews.splice.apply(this._childViews, args);
    }

    this.arrayContentDidChange(idx, removedCount, addedCount);
    this.childViewsDidChange(this._childViews, idx, removedCount, addedCount);

    return this;

replace: function(idx, removedCount, addedViews) {
    var addedCount = addedViews ? get(addedViews, 'length') : 0;
    var self = this;
    Ember.assert("You can't add a child to a container - the child is already a child of another view", emberA(addedViews).every(function(item) { return !get(item, '_parentView') || get(item, '_parentView') === self; }));

    this.arrayContentWillChange(idx, removedCount, addedCount);
    this.childViewsWillChange(this._childViews, idx, removedCount);

    if (addedCount === 0) {
      this._childViews.splice(idx, removedCount) ;
    } else {
      var args = [idx, removedCount].concat(addedViews);
      if (addedViews.length && !this._childViews.length) { this._childViews = this._childViews.slice(); }
      this._childViews.splice.apply(this._childViews, args);
    }

    this.arrayContentDidChange(idx, removedCount, addedCount);
    this.childViewsDidChange(this._childViews, idx, removedCount, addedCount);

    return this;

selectionDidChange: observer('selection.[]', function() {
    var selection = get(this, 'selection');
    if (get(this, 'multiple')) {
      if (!isArray(selection)) {
        set(this, 'selection', emberA([selection]));
        return;
      }
      this._selectionDidChangeMultiple();
    } else {
      this._selectionDidChangeSingle();
    }
  }),