Feature Request: Adding a custom class to items

I did something like this to add a custom class attribute to images items.
The problem is, I can’t find a filter to add this class to the item output. Inspecting the code it seems it’s impossible to do it, am I wrong?

Could this feature be added?

add_filter('vpf_extend_image_controls', 'hd_vpf_extend_image_controls', 10, 2);
function hd_vpf_extend_image_controls($controls, $name) {
	$class_control = array(
			'type'        => 'text',
			'label'       => esc_html__( 'Additional Class', 'visual-portfolio' ),
			'description' => esc_html__( 'Additional class for item', 'visual-portfolio' ),
			'name'        => 'text_control_additional_class',
			'placeholder' => esc_html__( 'some-class', 'visual-portfolio' ),
			'default'     => ''
	);
	$controls['additional_class'] = $class_control;
	return $controls;
}