override generate rating in module

// Override JNews Generate Rating

global $pagenow;
if ( 'post.php' === $pagenow || ! is_admin() || ( defined( 'DOING_AJAX' ) && 'DOING_AJAX' ) ) {
    remove_filter( 'jnews_review_generate_rating', 'jnews_review_generate_rating', null );
    add_filter( 'jnews_review_generate_rating', 'custom_review_generate', null, 3 );

    if ( ! function_exists( 'custom_review_generate' ) ) {
        function custom_review_generate( $review, $post_id, $class ) {
            // Return your post rating here
            return '<span> your review star </span>';
        }
    }
}