fix some errors

com.unity.uiwidgets/Runtime/rendering/editable.cs

             markNeedsLayout();
         }
         
-        public void systemFontsDidChange() {
+        public override void systemFontsDidChange() {
             base.systemFontsDidChange();
             _textPainter.markNeedsLayout();
             _textLayoutLastMaxWidth = null;

com.unity.uiwidgets/Runtime/rendering/object.mixin.gen.cs

      
     public abstract class RelayoutWhenSystemFontsChangeMixinRenderBox : RenderBox, RelayoutWhenSystemFontsChangeMixin {
     
-        public void systemFontsDidChange() {
+        public virtual void systemFontsDidChange() {
             markNeedsLayout();
         }
         
     
     public abstract class
             RelayoutWhenSystemFontsChangeMixinRenderBoxContainerDefaultsMixinContainerRenderObjectMixinRenderBox<ChildType, ParentDataType>
-            : RenderBoxContainerDefaultsMixinContainerRenderObjectMixinRenderBox<ChildType, ParentDataType>
+            : RenderBoxContainerDefaultsMixinContainerRenderObjectMixinRenderBox<ChildType, ParentDataType>, RelayoutWhenSystemFontsChangeMixin
-            
-            public float? defaultComputeDistanceToFirstActualBaseline(TextBaseline baseline) {
-                var child = firstChild;
-                while (child != null) {
-                    var childParentData = (ParentDataType) child.parentData;
-                    float? result = child.getDistanceToActualBaseline(baseline);
-                    if (result != null) {
-                        return result.Value + childParentData.offset.dy;
-                    }
-    
-                    child = childParentData.nextSibling;
-                }
-    
-                return null;
-            }
-    
-            public float? defaultComputeDistanceToHighestActualBaseline(TextBaseline baseline) {
-                float? result = null;
-                var child = firstChild;
-                while (child != null) {
-                    var childParentData = (ParentDataType) child.parentData;
-                    float? candidate = child.getDistanceToActualBaseline(baseline);
-                    if (candidate != null) {
-                        candidate += childParentData.offset.dy;
-                        if (result != null) {
-                            result = Mathf.Min(result.Value, candidate.Value);
-                        } else {
-                            result = candidate;
-                        }
-                    }
-    
-                    child = childParentData.nextSibling;
-                }
-    
-                return result;
-            }
-    
-            public void defaultPaint(PaintingContext context, Offset offset) {
-                var child = firstChild;
-                while (child != null) {
-                    var childParentData = (ParentDataType) child.parentData;
-                    context.paintChild(child, childParentData.offset + offset);
-                    child = childParentData.nextSibling;
-                }
-            }
-    
-           public bool defaultHitTestChildren(BoxHitTestResult result, Offset position) {
-                ChildType child = lastChild;
-                while (child != null) {
-                    ParentDataType childParentData = child.parentData as ParentDataType;
-                    bool isHit = result.addWithPaintOffset(
-                        offset: childParentData.offset,
-                        position: position,
-                        hitTest: (BoxHitTestResult boxHitTestResult, Offset transformed) => {
-                            D.assert(transformed == position - childParentData.offset);
-                            return child.hitTest(boxHitTestResult, position: transformed);
-                        }
-                    );
-    
-                    if (isHit) 
-                        return true;
-                    child = childParentData.previousSibling;
-                    }
-                return false;
-            }
-    
-            public List<ChildType> getChildrenAsList() {
-                var result = new List<ChildType>();
-                var child = firstChild;
-                while (child != null) {
-                    var childParentData = (ParentDataType) child.parentData;
-                    result.Add(child);
-                    child = childParentData.nextSibling;
-                }
-    
-                return result;
-            }
-            
-            public void systemFontsDidChange() {
+
+            public virtual void systemFontsDidChange() {
                 markNeedsLayout();
             }
             

com.unity.uiwidgets/Runtime/rendering/paragraph.cs

             }
         }
 
-        public  void attach(object owner) {
+        public override void attach(object owner) {
             base.attach(owner);
             /*if (_hoverAnnotation != null) {
                 RendererBinding.instance.mouseTracker.attachAnnotation(_hoverAnnotation);
             _textPainter.layout(minWidth, widthMatters ? maxWidth : float.PositiveInfinity);
         }
 
-        public void systemFontsDidChange() {
+        public override void systemFontsDidChange() {
             base.systemFontsDidChange();
             _textPainter.markNeedsLayout();
         }