How to override the PurchasedPlanListBuilder for Apigee M10n

custom_module.module

<?php

// Place in `custom_module/custom_module.module`

use Drupal\custom_module\Entity\ListBuilder\PurchasedPlanListBuilder;

/**
 * Implements hook_entity_type_alter().
 */
function custom_module_entity_type_alter(array &$entity_types) {
  // Set the list builder to use the custom one we implemented.
  $entity_types['purchased_plan']->setListBuilderClass(PurchasedPlanListBuilder::class);
}

PurchasedPlanListBuilder.php

<?php

// Place in `custom_module/src/Entity/ListBuilder/PurchasedPlanListBuilder.php`

namespace Drupal\custom_module\Entity\ListBuilder;

use Drupal\apigee_m10n\Entity\ListBuilder\PurchasedPlanListBuilder as ApigeePurchasedPlanListBuilder;

class PurchasedPlanListBuilder extends ApigeePurchasedPlanListBuilder {

  /**
   * {@inheritdoc}
   */
  public function render() {
    $build = parent::render()
      
    // Do your own thing here.
    // You can inspect $build and change things.
      
    return $build;
  }
  
}