Use fields in hidden native DOM classes instead of getters/setters.

client/dom/generated/src/frog/SVGFEBlendElement.dart

Index: client/dom/generated/src/frog/SVGFEBlendElement.dart
diff --git a/client/dom/generated/src/frog/SVGFEBlendElement.dart b/client/dom/generated/src/frog/SVGFEBlendElement.dart
index 4a36f31eb31e57138c555aed3621143a0e0e6c61..9c04e11b7e64bcb180294ce8694197a5d019de36 100644
--- a/client/dom/generated/src/frog/SVGFEBlendElement.dart
+++ b/client/dom/generated/src/frog/SVGFEBlendElement.dart
@@ -13,29 +13,29 @@ class _SVGFEBlendElementJs extends _SVGElementJs implements SVGFEBlendElement na
 
   static final int SVG_FEBLEND_MODE_UNKNOWN = 0;
 
-  _SVGAnimatedStringJs get in1() native "return this.in1;";
+  final _SVGAnimatedStringJs in1;
 
-  _SVGAnimatedStringJs get in2() native "return this.in2;";
+  final _SVGAnimatedStringJs in2;
 
-  _SVGAnimatedEnumerationJs get mode() native "return this.mode;";
+  final _SVGAnimatedEnumerationJs mode;
 
   // From SVGFilterPrimitiveStandardAttributes
 
-  _SVGAnimatedLengthJs get height() native "return this.height;";
+  final _SVGAnimatedLengthJs height;
 
-  _SVGAnimatedStringJs get result() native "return this.result;";
+  final _SVGAnimatedStringJs result;
 
-  _SVGAnimatedLengthJs get width() native "return this.width;";
+  final _SVGAnimatedLengthJs width;
 
-  _SVGAnimatedLengthJs get x() native "return this.x;";
+  final _SVGAnimatedLengthJs x;
 
-  _SVGAnimatedLengthJs get y() native "return this.y;";
+  final _SVGAnimatedLengthJs y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringJs get className() native "return this.className;";
+  final _SVGAnimatedStringJs className;
 
-  _CSSStyleDeclarationJs get style() native "return this.style;";
+  final _CSSStyleDeclarationJs style;
 
   _CSSValueJs getPresentationAttribute(String name) native;
 }