Tips on Customizing Product barcode generator | WooCommerce barcode Generator

How to Hide Product Barcode Generator Admin Menus

function plt_hide_product_barcode_generator_menus() {
	//Hide "Woo barcode".
	remove_menu_page('pbar_print');
	//Hide "Woo barcode → Woo barcode".
	remove_submenu_page('pbar_print', 'pbar_print');
	//Hide "Woo barcode → Order barcode".
	remove_submenu_page('pbar_print', 'pbar_orderemail');
	//Hide "Woo barcode → Print Page".
	remove_submenu_page('pbar_print', 'pbar_printpage');
	//Hide "Woo barcode → Download Page".
	remove_submenu_page('pbar_print', 'pbar_downbar');
}

add_action('admin_menu', 'plt_hide_product_barcode_generator_menus', 11);

Where do I put this code?

How to Hide Product Barcode Generator Meta Boxes

function plt_hide_product_barcode_generator_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Order Barcode" meta box.
	remove_meta_box('mv_other_fields', $screen->id, 'side');
	//Hide the "Product barcode" meta box.
	remove_meta_box('Productbarcodes', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_product_barcode_generator_metaboxes', 20);