add some files

com.unity.uiwidgets.devtools/Editor/inspector/layout_explorer/box/box.cs

   }
   
     public class BoxLayoutExplorerWidget : LayoutExplorerWidget {
-        public BoxLayoutExplorerWidget(
-    InspectorController inspectorController,
-    Key key
-  ) : base(inspectorController, key: key){ }
+      public BoxLayoutExplorerWidget(
+        InspectorController inspectorController = null,
+        Key key = null
+      ) : base(inspectorController, key: key)
+      {
+        
+      }
-  public static bool shouldDisplay(RemoteDiagnosticsNode node) {
-    // TODO(jacobr) pass a RemoteDiagnosticsNode to this method that contains
-    // the layout explorer related supplemental properties so that we can
-    // accurately determine whether the widget uses box layout.
-    return node != null;
-  }
+      public static bool shouldDisplay(RemoteDiagnosticsNode node) {
+        // TODO(jacobr) pass a RemoteDiagnosticsNode to this method that contains
+        // the layout explorer related supplemental properties so that we can
+        // accurately determine whether the widget uses box layout.
+        return node != null;
+      }
 
 
   public override State createState()

com.unity.uiwidgets/Runtime/animation/animation_controller.cs

 
         public override float value {
             get { return _value; }
-            
-        float _value;
+        public float _value;
 
         public void setValue(float newValue) {
             stop();

com.unity.uiwidgets/Runtime/widgets/single_child_scroll_view.cs

     public class SingleChildScrollView : StatelessWidget {
         public SingleChildScrollView(
             Key key = null,
-            Axis scrollDirection = Axis.vertical,
+            Axis? scrollDirection = null,
             bool reverse = false,
             EdgeInsetsGeometry padding = null,
             bool? primary = null,
                 () =>
                     "Primary ScrollViews obtain their ScrollController via inheritance from a PrimaryScrollController widget. " +
                     "You cannot both set primary to true and pass an explicit controller.");
-            this.scrollDirection = scrollDirection;
+            this.scrollDirection = scrollDirection?? Axis.vertical;
             this.reverse = reverse;
             this.padding = padding;
             this.primary = primary ?? controller == null && scrollDirection == Axis.vertical;

com.unity.uiwidgets.devtools/Editor/inspector/inspector_text_style.cs

+using uiwidgets;
+using Unity.UIWidgets.material;
+using Unity.UIWidgets.ui;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+using ThemeUtils = Unity.UIWidgets.DevTools.inspector.layout_explorer.ui.ThemeUtils;
+
+namespace Unity.UIWidgets.DevTools.inspector
+{
+    public class inspector_text_styles
+    {
+        public static TextStyle unimportant(ColorScheme colorScheme)
+        {
+            
+            return new TextStyle(
+                color: CommonThemeUtils.isLight ? Colors.grey.shade500 : Colors.grey.shade600);
+        }
+
+        public static TextStyle regular = new TextStyle();
+        public static TextStyle warning(ColorScheme colorScheme) => new TextStyle(
+            color:
+            CommonThemeUtils.isLight ? Colors.orange.shade900 : Colors.orange.shade400);
+        public static TextStyle error(ColorScheme colorScheme) => new TextStyle(
+            color: CommonThemeUtils.isLight ? Colors.red.shade500 : Colors.red.shade400
+        );
+        TextStyle link(ColorScheme colorScheme) => new TextStyle(
+            color: CommonThemeUtils.isLight ? Colors.blue.shade700 : Colors.blue.shade300,
+            decoration: TextDecoration.underline
+        );
+
+        TextStyle regularBold(ColorScheme colorScheme) => new TextStyle(
+            color: CommonThemeUtils.defaultForeground,
+            fontWeight: FontWeight.w700
+        );
+        TextStyle regularItalic(ColorScheme colorScheme) => new TextStyle(
+            color: CommonThemeUtils.defaultForeground,
+            fontStyle: FontStyle.italic
+        );
+        TextStyle unimportantItalic(ColorScheme colorScheme) =>
+            unimportant(colorScheme).merge(new TextStyle(
+        fontStyle: FontStyle.italic
+        ));
+    }
+}