file.routing.yml
1 string reference to YAML keys in file.routing.yml
- ManagedFile::processManagedFile in core/modules/ file/ src/ Element/ ManagedFile.php 
- Render API callback: Expands the managed_file element type.
File
- 
              core/modules/ file/ file.routing.yml 
View source
- file.ajax_progress:
-   path: '/file/progress/{key}'
-   defaults:
-     _controller: '\Drupal\file\Controller\FileWidgetAjaxController::progress'
-   requirements:
-     _permission: 'access content'
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