Default asset manager in custom component

I am in process to create custom component for below template and we want to have user enter text,link,hover text and select image and want to use default asset manager to select image but not sure how to get selected image in custom component? below is code I have used view: defaultType.view.extend({ init() { this.listenTo(this.model, 'active', this.doStuff); // listen for active event }, doStuff() { editor.runCommand('open-assets', { target: editor.getSelected() }); } });