Change record status: 
Project: 
Introduced in branch: 
11.x
Introduced in version: 
10.3.0
Description: 

From 10.3.0 instantiating an instance of \Drupal\Core\Render\HtmlResponseAttachmentsProcessor now requires an \Drupal\Core\Asset\ImportMapsRenderer argument.

Before

$processor = new HtmlResponseAttachmentsProcessor(
  \Drupal::service('asset.resolver'),
  \Drupal::service('config.factory'),
  \Drupal::service('asset.css.collection_renderer'),
  \Drupal::service('asset.js.collection_renderer'),
  \Drupal::service('request_stack'),
  \Drupal::service('renderer'),
  \Drupal::service('module_handler'),
  \Drupal::service('language_manager'),
);

After

$processor = new HtmlResponseAttachmentsProcessor(
  \Drupal::service('asset.resolver'),
  \Drupal::service('config.factory'),
  \Drupal::service('asset.css.collection_renderer'),
  \Drupal::service('asset.js.collection_renderer'),
  \Drupal::service('request_stack'),
  \Drupal::service('renderer'),
  \Drupal::service('module_handler'),
  \Drupal::service('language_manager'),
  \Drupal::service('asset.importmaps.collection_renderer'),
)
Impacts: 
Module developers