openfed-8.x-8.5/modules/d10_compatibility/ckeditor_uploadimage/ckeditor_uploadimage.routing.yml

ckeditor_uploadimage.save:
  path: '/ckeditor_uploadimage/save_file'
  defaults:
    _controller: '\Drupal\ckeditor_uploadimage\Controller\CKEditorUploadImageController::saveFile'
  requirements:
    _permission: 'use ckeditor_uploadimage'