Cannot get files from plugin loaded with bootstrap

[gijsjager]

Is there a way to fetch the files from a plugin directory loaded with Bootstrap that is in the vendor directory?

With the HTML helper File you can fetch a JS file like: $this-Html->script('Pluginname.Filename');

But this is not possible if you do something like: $this->Shrink->js('Pluginname.Filename.js');

What is the best way to achieve this?

Many thanks