Make dart:dom implementation types private so they don't muddle the docs.

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

Index: client/dom/generated/src/frog/SVGViewElement.dart
diff --git a/client/dom/generated/src/frog/SVGViewElement.dart b/client/dom/generated/src/frog/SVGViewElement.dart
index 68dc06e2a5a92e8f23de78c286ea122218b036cd..bb4e06e9a859fa765b4c00318fdaee677bb4bd83 100644
--- a/client/dom/generated/src/frog/SVGViewElement.dart
+++ b/client/dom/generated/src/frog/SVGViewElement.dart
@@ -1,17 +1,17 @@
 
-class SVGViewElementJs extends SVGElementJs implements SVGViewElement native "*SVGViewElement" {
+class _SVGViewElementJs extends _SVGElementJs implements SVGViewElement native "*SVGViewElement" {
 
-  SVGStringListJs get viewTarget() native "return this.viewTarget;";
+  _SVGStringListJs get viewTarget() native "return this.viewTarget;";
 
   // From SVGExternalResourcesRequired
 
-  SVGAnimatedBooleanJs get externalResourcesRequired() native "return this.externalResourcesRequired;";
+  _SVGAnimatedBooleanJs get externalResourcesRequired() native "return this.externalResourcesRequired;";
 
   // From SVGFitToViewBox
 
-  SVGAnimatedPreserveAspectRatioJs get preserveAspectRatio() native "return this.preserveAspectRatio;";
+  _SVGAnimatedPreserveAspectRatioJs get preserveAspectRatio() native "return this.preserveAspectRatio;";
 
-  SVGAnimatedRectJs get viewBox() native "return this.viewBox;";
+  _SVGAnimatedRectJs get viewBox() native "return this.viewBox;";
 
   // From SVGZoomAndPan