Module development and code questions

I have created a custom module that has a customized serializer for modifying some objects in the views Image.

However, I am encountering the following error:

Class Drupal\custom_serializer\Plugin\views\style\CustomSerializer extends unknown class Drupal\rest\Plugin\views\style\Serializer.

this is my code:
 

Hi team

I have the following issue:
I've created a module with a controller, and I've created another module with another controller. I've imported that controller there, but when I try to instantiate it, it shows the error: 'Instantiated class Drupal\custom_module\Controller\getItems not found.'

here is my code:

I need an Array of the query-parameters. However, when I tried to get all the query parameters via the request-object, it returned two parameters, that didn't belong there: "destination" and "_exception_statuscode". Is there a way to get the original query from the request object?

Is it possible to use webforms to adjust values of fields based on other fields using ajax?

Hi team.
I'm using Entityqueue module with Drupal 9, and I am in the process of upgrading to Drupal 10. As part of this upgrade, I have installed the Upgrade Status module. However, I encountered the following issue:
Call to static method load() on an unknown class Drupal\entityqueue\Entity\EntitySubqueue.

In my code, I am using the following line:

Hi Everyone,

I want to change the comments order based on a field value but I am unable to change it I have tried so many hooks but none of them are working as I wanted 

here are some examples which I tried 
 

function hook_entity_type_alter(array &$entity_types) {

  if (isset($entity_types['comment'])) {
    // dd($entity_types['comment']);
    $entity_types['comment']->setHandlerClass('storage', 'Drupal\test\TestStorage');
  }
}

function hook_preprocess_comment(&$vars) {
  dump($vars);
  }