Interface update, per-method Contexts.

filter/featureBreaker/tq.go

Index: filter/featureBreaker/tq.go
diff --git a/filter/featureBreaker/tq.go b/filter/featureBreaker/tq.go
index 14a51e70bbb73ad7846bdfe8ece5c8502369bbea..c5c84482c67e91159d8ae844530c8c16c2004df1 100644
--- a/filter/featureBreaker/tq.go
+++ b/filter/featureBreaker/tq.go
@@ -34,8 +34,8 @@ func (t *tqState) Stats(queueNames []string, cb tq.RawStatsCB) error {
 	return t.run(func() error { return t.tq.Stats(queueNames, cb) })
 }
 
-func (t *tqState) Testable() tq.Testable {
-	return t.tq.Testable()
+func (t *tqState) GetTestable() tq.Testable {
+	return t.tq.GetTestable()
 }
 
 // FilterTQ installs a featureBreaker TaskQueue filter in the context.