Expanded class hierarchy of SelectionEntityTypeUser in Entity reference 8
- class \Drupal\entityreference\Plugin\entityreference\selection\SelectionBase implements SelectionInterface
- class \Drupal\entityreference\Plugin\Type\Selection\SelectionEntityTypeComment
- class \Drupal\entityreference\Plugin\Type\Selection\SelectionEntityTypeFile
- class \Drupal\entityreference\Plugin\Type\Selection\SelectionEntityTypeNode
- class \Drupal\entityreference\Plugin\Type\Selection\SelectionEntityTypeTaxonomyTerm
- class \Drupal\entityreference\Plugin\Type\Selection\SelectionEntityTypeUser