fix simple compilation errors

com.unity.uiwidgets/Runtime/async/coroutine.cs

+/*
 using System;
 using System.Collections;
 using System.Collections.Generic;
             public volatile bool isDone;
         }
     }
-}
+}*/

com.unity.uiwidgets/Runtime/async/microtask_queue.cs

+/*
 using System;
 using System.Collections.Generic;
 using Unity.UIWidgets.foundation;
             }
         }
     }
-}
+}*/

com.unity.uiwidgets/Runtime/async/priority_queue.cs

+
 using System;
 using System.Collections.Generic;
 

com.unity.uiwidgets/Runtime/async/timer.cs

+/*
 using System;
 using System.Collections.Generic;
 using Unity.UIWidgets.foundation;
             }
         }
     }
-}
+}*/

com.unity.uiwidgets/Runtime/async2/schedule_microtask.cs

 using System;
 using System.Runtime.InteropServices;
 using AOT;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 using UnityEngine;
 
 namespace Unity.UIWidgets.async2 {

com.unity.uiwidgets/Runtime/async2/timer.cs

 using System;
 using System.Runtime.InteropServices;
 using AOT;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 using UnityEngine;
 
 namespace Unity.UIWidgets.async2 {
 
             return Zone.current
                 .createTimer(duration, Zone.current.bindCallbackGuarded(callback));
+        }
+
+        public static Timer create(TimeSpan duration, Action callback) {
+            return create(duration, () => {
+                callback.Invoke();
+                return null;
+            });
         }
 
         public static Timer periodic(TimeSpan duration, ZoneUnaryCallback callback) {
             _wakeupTime = wakeupTime;
             _milliSeconds = milliSeconds;
             _repeating = repeating;
+        }
+        
+                
+        public static TimeSpan timespanSinceStartup {
+            get { return TimeSpan.FromMilliseconds(UIMonoState_timerMillisecondClock()); }
         }
 
         internal static _Timer _createTimer(ZoneUnaryCallback callback, int milliSeconds, bool repeating) {

com.unity.uiwidgets/Runtime/engine2/UIWidgetsPanel.cs

 using System.Runtime.InteropServices;
 using AOT;
 using Unity.UIWidgets.foundation;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
-using NativeBindings = Unity.UIWidgets.ui2.NativeBindings;
+using NativeBindings = Unity.UIWidgets.ui.NativeBindings;
 
 namespace Unity.UIWidgets.engine2 {
     public partial class UIWidgetsPanel : MonoBehaviour {

com.unity.uiwidgets/Runtime/external/RTree.cs

+/*
 using System;
 using System.Collections.Generic;
 using System.Linq;
             }
         }
     }
-}
+}*/

com.unity.uiwidgets/Runtime/external/SplayTree.cs

+/*
 using System;
 using System.Collections;
 using System.Collections.Generic;
             }
         }
     }
-}
+}*/

com.unity.uiwidgets/Runtime/foundation/binding.cs

 using developer;
 using RSG;
 using Unity.UIWidgets.async2;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 
 namespace Unity.UIWidgets.foundation {
     public delegate Future<IDictionary<string, object>>

com.unity.uiwidgets/Runtime/foundation/debug.cs

 
         public static void _debugDrawDoubleRect(Canvas canvas, Rect outerRect, Rect innerRect, Color color) {
             Path path = new Path();
+            path.fillType = PathFillType.evenOdd;
-            path.winding(PathWinding.clockwise);
             var paint = new Paint {
                 color = color
             };

com.unity.uiwidgets/Runtime/foundation/isolates.cs

 using System.ComponentModel;
 using Unity.UIWidgets.async2;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 
 namespace Unity.UIWidgets.foundation {
     public delegate R ComputeCallback<Q, R>(Q message);

com.unity.uiwidgets/Runtime/gestures/binding.cs

 using System;
 using System.Collections.Generic;
-using Unity.UIWidgets.async;
+using Unity.UIWidgets.async2;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.scheduler;
 using Unity.UIWidgets.ui;
         }
 
         public GestureBinding() {
-            Window.instance.onPointerEvent += _handlePointerDataPacket;
+            Window.instance.onPointerDataPacket += _handlePointerDataPacket;
 
             gestureArena = new GestureArenaManager();
         }
             foreach (var pointerEvent in PointerEventConverter.expand(packet.data, Window.instance.devicePixelRatio)) {
                 _pendingPointerEvents.Enqueue(pointerEvent);
             }
-
+ 
             _flushPointerEventQueue();
         }
 
             }
 
             _pendingPointerEvents.Enqueue(
-                new PointerCancelEvent(timeStamp: Timer.timespanSinceStartup, pointer: pointer));
+                new PointerCancelEvent(timeStamp: _Timer.timespanSinceStartup, pointer: pointer));
         }
 
         void _flushPointerEventQueue() {

com.unity.uiwidgets/Runtime/gestures/multidrag.cs

 using System;
 using System.Collections.Generic;
-using Unity.UIWidgets.async;
+using Unity.UIWidgets.async2;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.ui;
 
             TimeSpan? delay = null)
             : base(initialPosition) {
             D.assert(delay != null);
-            _timer = Window.instance.run(delay ?? Constants.kLongPressTimeout, _delayPassed, false);
+            _timer = Timer.create(delay ?? Constants.kLongPressTimeout, _delayPassed);
         }
 
         Timer _timer;

com.unity.uiwidgets/Runtime/gestures/multitap.cs

 using System;
 using System.Collections.Generic;
-using Unity.UIWidgets.async;
+using Unity.UIWidgets.async2;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.ui;
 
     class _CountdownZoned {
         public _CountdownZoned(TimeSpan duration) {
             D.assert(duration != null);
-            _timer = Window.instance.run(duration, _onTimeout);
+            _timer = Timer.create(duration, _onTimeout);
         }
 
         public bool _timeout = false;
         void _startDoubleTapTimer() {
             _doubleTapTimer =
                 _doubleTapTimer
-                ?? Window.instance.run(Constants.kDoubleTapTimeout, _reset);
+                ?? Timer.create(Constants.kDoubleTapTimeout, _reset);
         }
 
         void _stopDoubleTapTimer() {
             _lastPosition = OffsetPair.fromEventPosition(evt);
             startTrackingPointer(handleEvent, evt.transform);
             if (longTapDelay > TimeSpan.Zero) {
-                _timer = Window.instance.run(longTapDelay, () => {
+                _timer = Timer.create(longTapDelay, () => {
                     _timer = null;
                     this.gestureRecognizer._dispatchLongTap(evt.pointer, _lastPosition);
                 });

com.unity.uiwidgets/Runtime/gestures/recognizer.cs

 using System;
 using System.Collections.Generic;
-using Unity.UIWidgets.async;
+using Unity.UIWidgets.async2;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.ui;
 using UnityEngine;
                 primaryPointer = evt.pointer;
                 initialPosition = new OffsetPair(local: evt.localPosition, global: evt.position);
                 if (deadline != null) {
-                    _timer = Window.instance.run(deadline.Value, () => didExceedDeadlineWithEvent(evt));
+                    _timer = Timer.create(deadline.Value, () => didExceedDeadlineWithEvent(evt));
                 }
             }
         }

com.unity.uiwidgets/Runtime/scheduler2/binding.cs

 using Unity.UIWidgets.async;
 using Unity.UIWidgets.async2;
 using Unity.UIWidgets.foundation;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
-using FrameTiming = Unity.UIWidgets.ui2.FrameTiming;
+using FrameTiming = Unity.UIWidgets.ui.FrameTiming;
 using Timer = Unity.UIWidgets.async2.Timer;
 
 namespace Unity.UIWidgets.scheduler2 {

com.unity.uiwidgets/Runtime/services/asset_bundle.cs

 using Unity.UIWidgets.async2;
 using Unity.UIWidgets.engine2;
 using Unity.UIWidgets.foundation;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 using UnityEngine.Networking;
 
 namespace Unity.UIWidgets.services {

com.unity.uiwidgets/Runtime/services/binary_messenger.cs

 using System;
 using Unity.UIWidgets.async2;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 
 namespace Unity.UIWidgets.services {
     public delegate Future<byte[]> MessageHandler(byte[] message);

com.unity.uiwidgets/Runtime/services/binding.cs

 using System.Collections.Generic;
 using Unity.UIWidgets.async2;
 using Unity.UIWidgets.foundation;
-using Unity.UIWidgets.ui2;
+using Unity.UIWidgets.ui;
 
 namespace Unity.UIWidgets.services {
     public class ServicesBinding : BindingBase {

com.unity.uiwidgets/Runtime/ui2/window.cs

             Window_scheduleFrame(_ptr);
         }
 
+        public void scheduleMicrotask(Action callback) {
+            async_.scheduleMicrotask(() => {
+                callback.Invoke();
+                return null;
+            });
+        }
+
         public void render(Scene scene) {
             Window_render(_ptr, scene._ptr);
         }

com.unity.uiwidgets/Runtime/ui2/painting.meta

-fileFormatVersion: 2
-guid: e01e51b924af484789f4f45614020d99
-timeCreated: 1595649311