--- clientv3/balancer.go    2016-09-23 13:49:03.000000000 -0400
+++ clientv3/balancer.go~   2016-10-26 16:08:39.554660000 -0400
@@ -66,7 +66,9 @@
    return sb
 }

-func (b *simpleBalancer) Start(target string) error { return nil }
+//func (b *simpleBalancer) Start(target string) error { return nil }
+
+func (b *simpleBalancer) Start(target string, cfg grpc.BalancerConfig) error { return nil }

 func (b *simpleBalancer) ConnectNotify() <-chan struct{} {
    b.mu.Lock()