.

wcfs/δbtail.go

@@ -145,6 +145,8 @@ type ΔValue struct {
 //   .ForgetPast(revCut)			- forget changes past revCut
 //   .SliceByRev(lo, hi) -> []δB		- XXX
 //   .SliceByRootRev(root, lo, hi) -> []δT	- XXX
+//
+// XXX also:
 //   .Get(root, key, at)			- get root[key] @at assuming root[key] ∈ tracked
 //
 // An example for tracked set is a set of visited BTree paths.
@@ -1403,15 +1405,12 @@ func (δBtail *ΔBtail) Get(ctx context.Context, root *Tree, key Key, at zodb.Ti
 	if err != nil || !ok {
 		return
 	}
-	v, ok := xvalue.(zodb.IPersistent)
-	if !ok {
-		err = fmt.Errorf("got %T; expect ZODB persistent reference", xvalue)
+	value, err = vOid(xvalue)
+	if err != nil {
+		ok = false
 		return
 	}
 
-	value = v.POid()
-	ok = true
-
 	return
 }