framework/web/AssetManager.php
protected function loadDummyBundle($name)
    {
        if (!isset($this->_dummyBundles[$name])) {
            $this->_dummyBundles[$name] = $this->loadBundle($name, [
                'sourcePath' => null,
                'js' => [],
                'css' => [],
                'depends' => [],
            ]);
        }

        return $this->_dummyBundles[$name];
    }
protected function loadDummyBundle($name)
    {
        if (!isset($this->_dummyBundles[$name])) {
            $this->_dummyBundles[$name] = $this->loadBundle($name, [
                'sourcePath' => null,
                'js' => [],
                'css' => [],
                'depends' => [],
            ]);
        }

        return $this->_dummyBundles[$name];
    }
Loads dummy bundle by name.

@param string $name
@return AssetBundle