Cleanup warnings.

Runtime/gestures/multitap.cs

 
     public delegate void GestureMultiTapCancelCallback(int pointer);
 
-    public class _CountdownZoned {
-        _CountdownZoned(TimeSpan duration) {
+    class _CountdownZoned {
+        public _CountdownZoned(TimeSpan duration) {
             D.assert(duration != null);
             this._timer = Window.instance.run(duration, this._onTimeout);
         }
         ) {
             this.pointer = evt.pointer;
             this._initialPosition = evt.position;
+            this._doubleTapMinTimeCountdown = new _CountdownZoned(duration: doubleTapMinTime);
             this.entry = entry;
         }
 
             this.longTapDelay = longTapDelay ?? TimeSpan.Zero;
         }
 
-        GestureMultiTapDownCallback onTapDown;
+        public GestureMultiTapDownCallback onTapDown;
-        GestureMultiTapUpCallback onTapUp;
+        public GestureMultiTapUpCallback onTapUp;
-        GestureMultiTapCallback onTap;
+        public GestureMultiTapCallback onTap;
-        GestureMultiTapCancelCallback onTapCancel;
+        public GestureMultiTapCancelCallback onTapCancel;
-        TimeSpan longTapDelay;
+        public TimeSpan longTapDelay;
-        GestureMultiTapDownCallback onLongTapDown;
+        public GestureMultiTapDownCallback onLongTapDown;
 
         readonly Dictionary<int, _TapGesture> _gestureMap = new Dictionary<int, _TapGesture>();
 

Runtime/material/floatting_action_button_theme.cs

 
         public static FloatingActionButtonThemeData lerp(FloatingActionButtonThemeData a, FloatingActionButtonThemeData b,
             float t) {
-            D.assert(t != null);
             if (a == null && b == null) {
                 return null;
             }

Runtime/painting/text_painter.cs

             this._caretMetrics = new _CaretMetrics(
                 offset: rect != null ? new Offset(rect.left, rect.top) : this._emptyOffset,
                 fullHeight: rect != null ? (float?) (rect.bottom - rect.top) : null);
+            
+            // Cache the caret position. This was forgot in flutter until https://github.com/flutter/flutter/pull/38821
+            this._previousCaretPosition = position;
+            this._previousCaretPrototype = caretPrototype;
         }
 
         public Paragraph.LineRange getLineRange(int lineNumber) {

Runtime/ui/painting/path.cs

             return new PathMetricIterator(_pathMeasure);
         }
 
-        PathMetric _pathMetric;
+        // PathMetric _pathMetric; // TODO
         _PathMeasure _pathMeasure;
 
         public void Reset() {
         public PathMetric Current {
-            get { return this._pathMetric; }
+            get {
+                return null; // TODO : return this._pathMetric;
+            }
-            get { return this._pathMetric; }
+            get {
+                return null; // TODO : return this._pathMetric;
+            }
         }
 
         public bool MoveNext() {

Runtime/ui/painting/shadow_utils.cs

         static readonly Path _devSpacePath = new Path();
         public static void drawShadow(Canvas canvas, Path path, Vector3 zPlaneParams, Vector3 devLightPos,
             float lightRadius, uiColor ambientColor, uiColor spotColor, int flags) {
+            #pragma warning disable CS0162
             if (kUseFastShadow) {
                 drawShadowFast(canvas, path, zPlaneParams, devLightPos, lightRadius, ambientColor, spotColor, flags);
             }
+            #pragma warning restore CS0162
         }
         
         //cached variables
             Matrix3 viewMatrix = canvas.getTotalMatrix();
 
             //debug shadow
+            #pragma warning disable CS0162
             if (debugShadow) {
                 var isRRect = path.isNaiveRRect;
                 if (isRRect) {
                     spotColor = uiColor.fromColor(Colors.green);
                 }
             }
+            #pragma warning restore CS0162
 
             //ambient light
             float devSpaceOutset = ambientBlurRadius(zPlaneParams.z);

Runtime/ui/renderer/allocator/debug.cs

                 return;
             }
 
+            #pragma warning disable CS0162
             allocCount++;
             if (allocCount >= 120) {
                 allocCount = 0;
 
                 Debug.Log(debugInfo);
             }
+            #pragma warning restore CS0162
         }
 
         public static void onAlloc(int objKey, string objName, int allocatedCount) {

Runtime/ui/renderer/allocator/pool_object.cs

             var ret = pool.Pop();
             ret.setup();
 
+            #pragma warning disable CS0162
+            #pragma warning restore CS0162
 
             return ret;
         }
                 return;
             }
 
+            #pragma warning disable CS0162
             if (AllocDebugger.enableDebugging) {
                 if (!obj.activated_flag) {
                     Debug.Assert(false, "an item has been recycled more than once !");
 
                 AllocDebugger.onRelease(debugKey, debugName, allocatedCount);
             }
+            #pragma warning restore CS0162
 
             obj.clear();
             if (pool.Count > POOL_MAX_SIZE) {

Runtime/ui/renderer/common/geometry/matrix/ui_matrix.cs

             TypeMask mask = this._getType();
 
             if (0 == (mask & ~(TypeMask.kScale_Mask | TypeMask.kTranslate_Mask))) {
-                bool invertible = true;
+                // bool invertible = true; // Fix warning: value is never used
 
                 if (!invertableCheck) {
                     if ((mask & TypeMask.kScale_Mask) != 0) {

Runtime/widgets/editable_text.cs

             this.hasFocus = hasFocus;
             this.maxLines = maxLines;
             this.minLines = minLines;
+            this.expands = expands;
             this.strutStyle = strutStyle;
             this.selectionColor = selectionColor;
             this.textScaleFactor = textScaleFactor;

Samples/UIWidgetsGallery/demo/cupertino/cupertino_navigation_demo.cs

                                         },
                                         defaultTitle: "Colors"
                                     );
-                                    break;
-                                    break;
-                                    break;
                             }
 
                             return null;
         public override void initState() {
             base.initState();
 
+            this.relatedColors = new List<Color>();
             for (int i = 0; i < 10; i++) {
                 this.relatedColors.Add(
                     Color.fromARGB(