How to disable block caching on Drupal 11

To disable caching on Drupal custom blocks,

class LearnDrupalBlock extends BlockBase {
 /**
  * {@inheritdoc}
  */
   public function build() {
       return array(
           '#markup' => "This is LearnDrupalBlock"
       );
   }
   /**
    * {@inheritdoc}
    */
   public function getCacheMaxAge() {
       return 0;
   }
};