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function my_product_image( $product ) {
    if( isset( $product->id ) && has_post_thumbnail( $product->id ) ) {
        echo get_the_post_thumbnail( $product->id, array( 40, 40 ) );
    }
}
add_action( 'wcdn_order_item_before', 'my_product_image' );

this code doesn’t work when I paste it into the functions.php page inside my themes folder. I have it at the bottom.

should i place it somewhere else above or is the bottom a good place. because it’s not working still.