/**
* Gets the field definition.
*
* A View works on an entity type across bundles, and thus only has access to
* field storage definitions. In order to be able to use widgets and
* formatters, we create a generic field definition out of that storage
* definition.
*
* @see BaseFieldDefinition::createFromFieldStorageDefinition()
*
* @return \Drupal\Core\Field\FieldDefinitionInterface
* The field definition used by this handler.
*/
protected function getFieldDefinition()
{
if (!$this->fieldDefinition) {
$field_storage_config = $this->getFieldStorageDefinition();
$this->fieldDefinition = BaseFieldDefinition::createFromFieldStorageDefinition($field_storage_config);
}
return $this->fieldDefinition;
}
