Support for @mixin, @include and @extend

pkg/csslib/lib/src/messages.dart

 // Copyright (c) 2012, 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 csslib.src.messages;
 
 import 'package:logging/logging.dart' show Level;
 import 'package:source_maps/span.dart' show Span;
 
-import 'package:csslib/parser.dart';
-
 import 'options.dart';
 
 // TODO(terry): Remove the global messages, use some object that tracks
 //              compilation state.
 
 /** The global [Messages] for tracking info/warnings/messages. */
 Messages messages;
 
 // Color constants used for generating messages.
 final String GREEN_COLOR = '\u001b[32m';
@@ skipping 98 matching lines @@
   }
 
   /** Merge [newMessages] to this message lsit. */
   void mergeMessages(Messages newMessages) {
     messages.addAll(newMessages.messages);
     newMessages.messages.where((message) =>
         message.level.value == Level.SEVERE || options.verbose)
         .forEach((message) { printHandler(message); });
   }
 }