Revert "Remove unnecessary import" (dart-lang/stream_channel#71)
This reverts commit f2dcd319ec1efca9d01abd5500436e2cb63e4c53.
Since this has not been published or rolled through to the SDK or
Flutter we will hold it back to reduce risk.
diff --git a/pkgs/stream_channel/lib/src/json_document_transformer.dart b/pkgs/stream_channel/lib/src/json_document_transformer.dart
index 3feda43..237193b 100644
--- a/pkgs/stream_channel/lib/src/json_document_transformer.dart
+++ b/pkgs/stream_channel/lib/src/json_document_transformer.dart
@@ -7,6 +7,7 @@
import 'package:async/async.dart';
import '../stream_channel.dart';
+import 'stream_channel_transformer.dart';
/// A [StreamChannelTransformer] that transforms JSON documents—strings that
/// contain individual objects encoded as JSON—into decoded Dart objects.
