public function isBaseField();
/**
- * Returns a unique identifier for the field.
+ * Returns a unique identifier for the field storage.
*
* @return string
*/
public function getUniqueStorageIdentifier();
+ /**
+ * Returns whether the field is deleted or not.
+ *
+ * @return bool
+ * TRUE if the field is deleted, FALSE otherwise.
+ */
+ public function isDeleted();
+
}