Make package mime strong clean

lib/src/bound_multipart_stream.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library mime.bound_multipart_stream;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'mime_shared.dart';
 import 'char_code.dart';
@@ skipping 63 matching lines @@
   // The following states belong to `_controller`, state changes will not be
   // immediately acted upon but rather only after the current
   // `_multipartController` is done.
   static const int _CONTROLLER_STATE_IDLE = 0;
   static const int _CONTROLLER_STATE_ACTIVE = 1;
   static const int _CONTROLLER_STATE_PAUSED = 2;
   static const int _CONTROLLER_STATE_CANCELED = 3;
 
   int _controllerState = _CONTROLLER_STATE_IDLE;
 
-  StreamController _controller;
+  StreamController<MimeMultipart> _controller;
 
   Stream<MimeMultipart> get stream => _controller.stream;
 
   StreamSubscription _subscription;
 
-  StreamController _multipartController;
+  StreamController<List<int>> _multipartController;
   Map<String, String> _headers;
 
   int _state = _START;
   int _boundaryIndex = 2;
 
   // Current index in the data buffer. If index is negative then it
   // is the index into the artificial prefix of the boundary string.
   int _index;
   List<int> _buffer;
 
@@ skipping 271 matching lines @@
     }
 
     // Resume if at end.
     if (_index == _buffer.length) {
       _buffer = null;
       _index = null;
       _subscription.resume();
     }
   }
 }