WooCommerce - disable 'Order Complete' emails for specific Product ID

functions.php

<?php
add_filter( 'woocommerce_email_recipient_customer_completed_order', 'themename_disable_customer_order_email_for_product', 10, 2 );
function themename_disable_customer_order_email_for_product( $recipient, $order ) {
	// Get the current page.
	$page = $_GET['page'] = isset( $_GET['page'] ) ? $_GET['page'] : '';

	// If we're on a WooCommerce settings page, return the regular recipient.
	if ( 'wc-settings' === $page ) {
		return $recipient;
	}

	// Get items in this order.
	$items = (array) $order->get_items();

	// Loop through all items in this order.
	foreach ( $items as $item ) {

		// Get this product ID.
		$this_product_id = $item['product_id'];

		// If the product ID matches the Physical Product ID, then remove the recipient (do not send the email to the customer).
		if ( $this_product_id == 127 ) {
			$recipient = '';
		}

	}

	return $recipient;
}