[DO NOT CHECK IN] my debugging state for the assert when the drawer opens and closes prematurely

sky/sdk/lib/framework/components2/drawer.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import '../animation/animated_value.dart';
 import '../animation/curves.dart';
 import '../fn2.dart';
 import '../theme2/colors.dart';
 import '../theme2/shadows.dart';
 import 'animated_component.dart';
@@ skipping 22 matching lines @@
   void _checkValue() {
     var newClosedState = isClosed;
     if (onStatusChange != null && _oldClosedState != newClosedState) {
       onStatusChange(!newClosedState);
       _oldClosedState = newClosedState;
     }
   }
 
   bool get isClosed => position.value == -_kWidth;
   bool get _isMostlyClosed => position.value <= -_kWidth / 2;
-  void toggle(_) => _isMostlyClosed ? _open() : _close();
+  void toggle() => _isMostlyClosed ? _open() : _close();
 
   void handleMaskTap(_) => _close();
   void handlePointerDown(_) => position.stop();
 
   void handlePointerMove(sky.PointerEvent event) {
     if (position.isAnimating)
       return;
     position.value = math.min(0.0, math.max(position.value + event.dx, -_kWidth));
   }
 
@@ skipping 79 matching lines @@
       new StackContainer(
         children: [ mask, content ]
       ),
       onPointerDown: controller.handlePointerDown,
       onPointerMove: controller.handlePointerMove,
       onPointerUp: controller.handlePointerUp,
       onPointerCancel: controller.handlePointerCancel
     );
   }
 }