Event listening for loaded asset

I got it with update target

`updateTarget(trgt) {
                const image = this.model;
                const dirName = image.attributes.src;
                const filename = dirName.replace('https://d3d4x44eptevwm.cloudfront.net/md/','');

                trgt.set('attributes', {
                    src: `https://d3d4x44eptevwm.cloudfront.net/md/${filename}`,
                    srcSet: `https://d3d4x44eptevwm.cloudfront.net/sm/${filename} 350w, https://d3d4x44eptevwm.cloudfront.net/md/${filename} 700w, https://d3d4x44eptevwm.cloudfront.net/lg/${filename} 1280w, https://d3d4x44eptevwm.cloudfront.net/xl/${filename} 1800w, https://d3d4x44eptevwm.cloudfront.net/xxl/${filename} 2400w`,
                    sizes: sizes
                });
                editor.Modal.close();
                
            },`