Change record status: 
Project: 
Introduced in branch: 
8.x
Description: 

FAPI callbacks for file/image widgets have been moved to widget classes. The next conversion has been introduced:

Before Converted
file_field_widget_value() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::value()
file_field_widget_value() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::value()
file_field_widget_multiple_count_validate() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::validateMultipleCount()
file_field_widget_process() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::process()
file_field_widget_process_multiple() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::processMultiple()
_file_field_get_description_from_element() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::getDescriptionFromElement()
file_field_widget_submit() \Drupal\file\Plugin\Field\FieldWidget\FileWidget::submit()
image_field_widget_process() \Drupal\image\Plugin\Field\FieldWidget\ImageWidget::process()
_image_field_required_fields_validate() \Drupal\image\Plugin\Field\FieldWidget\ImageWidget::validateRequiredFields()
Impacts: 
Module developers