<?php

namespace backendassets;

use yiiwebAssetBundle;

class JsTreeAsset extends AssetBundle
{
    public $sourcePath = '@bower_components/jstree/dist';

    public $js = [
        'jstree.min.js',
    ];

    public $css = [
        'themes/default/style.min.css',
    ];

    public $depends = [
        'yiiwebJqueryAsset',
    ];
}

Yii::setAlias('bower_components', dirname(dirname(__DIR__)) . '/bower_components');

use backendassetsJsTreeAsset;

...

JsTreeAsset::register($this);