Woocommerce add alert if free shipping items and non-free shipping items added in cart

add_action( 'woocommerce_check_cart_items', 'custom_prevent_free_and_non_free_shipping_products' );
function custom_prevent_free_and_non_free_shipping_products() {
  // Check if the cart contains free shipping items
  $has_free_shipping = false;
  foreach( WC()->cart->get_cart() as $cart_item ) {
    if ( $cart_item['data']->get_shipping_class() === 'free-shipping' ) {
      $has_free_shipping = true;
      break;
    }
  }
   // Check if the cart contains non-free shipping items
  $has_non_free_shipping = false;
  foreach( WC()->cart->get_cart() as $cart_item ) {
    if ( $cart_item['data']->get_shipping_class() !== 'free-shipping' ) {
      $has_non_free_shipping = true;
      break;
    }
  }
   // If the cart contains both free and non-free shipping items, show an error message
  if ( $has_free_shipping && $has_non_free_shipping ) {
    wc_clear_notices();
    wc_add_notice( __( 'You cannot mix free and non-free shipping items in the cart.', 'c2code' ), 'error' );
  }
}