Work in progres, please take a look and give early feedback if this is the way we want to structure…

tests/service_tests/conformance/dart/conformance_service.dart

Index: tests/service_tests/conformance/dart/conformance_service.dart
diff --git a/tests/service_tests/conformance/dart/conformance_service.dart b/tests/service_tests/conformance/dart/conformance_service.dart
index ec92a990a41e1072e99748031e75091b34719210..6ae1c02c199515a33a98664a6cde1606891846ae 100644
--- a/tests/service_tests/conformance/dart/conformance_service.dart
+++ b/tests/service_tests/conformance/dart/conformance_service.dart
@@ -12,7 +12,8 @@ import "package:service/struct.dart";
 
 final Channel _channel = new Channel();
 final Port _port = new Port(_channel);
-final Foreign _postResult = Foreign.lookup("PostResultToService");
+final ForeignFunction _postResult =
+    ForeignLibrary.standard.lookup("PostResultToService");
 
 bool _terminated = false;
 ConformanceService _impl;