Dynamic Pricing - Product Ineligible for Discounts

functions.php

add_filter('woocommerce_dynamic_pricing_process_product_discounts', 'exclude_some_products', 10, 4);
function is_product_eligible( $eligible, $product, $discounter_name, $discounter_object ) {

    if ($product->ID == 200){
        $eligible = false;
    }

    return $eligible;

}