+ /**
+ * @return An internal mimetype to signal that an itemDropEvent() should be rejected by
+ * the receiving model.
+ *
+ * This mimeType can be used in createMimeData() to notify that the
+ * drop-onto-items events should be ignored, while the drop-between-items
+ * ones should be still accepted.
+ */
+ QString blacklistItemDropEventMimeType() const;
+