| Index: sdk/lib/async/stream_controller.dart
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| diff --git a/sdk/lib/async/stream_controller.dart b/sdk/lib/async/stream_controller.dart
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| index 5097da605f7aa48eb3dbab6a365484ccc17e83ba..02f197c958677f6ae2ecc854b2dba656183dc9aa 100644
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| --- a/sdk/lib/async/stream_controller.dart
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| +++ b/sdk/lib/async/stream_controller.dart
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| @@ -46,8 +46,7 @@ part of dart.async;
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|   * the stream at all, and won't trigger callbacks. From the controller's point
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|   * of view, the stream is completely inert when has completed.
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|   */
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| -class StreamController<T> extends StreamSink<T> {
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| -  // TODO(8997): Implement EventSink instead.
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| +class StreamController<T> extends EventSink<T> {
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|    final _StreamImpl<T> stream;
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|  
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|    /**
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| 
 |