code: function(treeType) {
      if (treeType === 'vendor') {
        // The treeForVendor returns a different value based on whether or not
        // this addon is a nested dependency
        return caclculateCacheKeyForTree(treeType, this, [!this.parent.parent]);
      } else {
        return this._super.cacheKeyForTree.call(this, treeType);
      }
    }
docs: ember-rollup implements a custom treeForVendor hook, we restore the caching for that hook here