} else if nsLabel != "" {
				outMsg := fmt.Sprintf("Namespace label %s matches", nsLabel)
				if strings.Contains(nsLabel, "kubernetes.io/metadata.name") {
					outMsg += " (Automatic injection is enabled in all namespaces)."
				}
				return outMsg, true
			} else if podLabel != "" {
				return fmt.Sprintf("Pod label %s matches", podLabel), true
			}

	for _, opt := range opts {
		mo = opt(mo)
	}
	dstMsg, srcMsg := dst.ProtoReflect(), src.ProtoReflect()
	if dstMsg.Descriptor() != srcMsg.Descriptor() {
		if got, want := dstMsg.Descriptor().FullName(), srcMsg.Descriptor().FullName(); got != want {
			panic(fmt.Sprintf("descriptor mismatch: %v != %v", got, want))
		}
		panic("descriptor mismatch")
	}
	mo.mergeMessage(dstMsg, srcMsg)
}