Don't filter "Stop" error in raw interface.

impl/memory/datastore_data.go

Index: impl/memory/datastore_data.go
diff --git a/impl/memory/datastore_data.go b/impl/memory/datastore_data.go
index 15ffc2f797c5cd5b6a45150c2177f9189e5e26d0..b0613e6defa409ea8f70fe6cc285e1fa5ad979fc 100644
--- a/impl/memory/datastore_data.go
+++ b/impl/memory/datastore_data.go
@@ -283,9 +283,6 @@ func (d *dataStoreData) putMulti(keys []*ds.Key, vals []ds.PropertyMap, cb ds.Pu
 		}()
 		if cb != nil {
 			if err := cb(k, err); err != nil {
-				if err == ds.Stop {
-					return nil
-				}
 				return err
 			}
 		}
@@ -358,9 +355,6 @@ func (d *dataStoreData) delMulti(keys []*ds.Key, cb ds.DeleteMultiCB) error {
 			}()
 			if cb != nil {
 				if err := cb(err); err != nil {
-					if err == ds.Stop {
-						return nil
-					}
 					return err
 				}
 			}
@@ -368,9 +362,6 @@ func (d *dataStoreData) delMulti(keys []*ds.Key, cb ds.DeleteMultiCB) error {
 	} else if cb != nil {
 		for range keys {
 			if err := cb(nil); err != nil {
-				if err == ds.Stop {
-					return nil
-				}
 				return err
 			}
 		}