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

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

 
 class _SVGMatrixJs extends _DOMTypeJs implements SVGMatrix native "*SVGMatrix" {
 
-  num get a() native "return this.a;";
+  num a;
 
-  void set a(num value) native "this.a = value;";
+  num b;
 
-  num get b() native "return this.b;";
+  num c;
 
-  void set b(num value) native "this.b = value;";
+  num d;
 
-  num get c() native "return this.c;";
+  num e;
 
-  void set c(num value) native "this.c = value;";
-
-  num get d() native "return this.d;";
-
-  void set d(num value) native "this.d = value;";
-
-  num get e() native "return this.e;";
-
-  void set e(num value) native "this.e = value;";
-
-  num get f() native "return this.f;";
-
-  void set f(num value) native "this.f = value;";
+  num f;
 
   _SVGMatrixJs flipX() native;
 
   _SVGMatrixJs flipY() native;
 
   _SVGMatrixJs inverse() native;
 
   _SVGMatrixJs multiply(_SVGMatrixJs secondMatrix) native;
 
   _SVGMatrixJs rotate(num angle) native;
 
   _SVGMatrixJs rotateFromVector(num x, num y) native;
 
   _SVGMatrixJs scale(num scaleFactor) native;
 
   _SVGMatrixJs scaleNonUniform(num scaleFactorX, num scaleFactorY) native;
 
   _SVGMatrixJs skewX(num angle) native;
 
   _SVGMatrixJs skewY(num angle) native;
 
   _SVGMatrixJs translate(num x, num y) native;
 }