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

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

Index: client/dom/generated/src/frog/SVGScriptElement.dart
diff --git a/client/dom/generated/src/frog/SVGScriptElement.dart b/client/dom/generated/src/frog/SVGScriptElement.dart
index c2ab3a8eaa5c399df0d380d51df50e1ab5e5f975..3ecc099fc85ea0d3db39e8574efaa1a82163af90 100644
--- a/client/dom/generated/src/frog/SVGScriptElement.dart
+++ b/client/dom/generated/src/frog/SVGScriptElement.dart
@@ -1,5 +1,5 @@
 
-class SVGScriptElementJs extends SVGElementJs implements SVGScriptElement native "*SVGScriptElement" {
+class _SVGScriptElementJs extends _SVGElementJs implements SVGScriptElement native "*SVGScriptElement" {
 
   String get type() native "return this.type;";
 
@@ -7,9 +7,9 @@ class SVGScriptElementJs extends SVGElementJs implements SVGScriptElement native
 
   // From SVGURIReference
 
-  SVGAnimatedStringJs get href() native "return this.href;";
+  _SVGAnimatedStringJs get href() native "return this.href;";
 
   // From SVGExternalResourcesRequired
 
-  SVGAnimatedBooleanJs get externalResourcesRequired() native "return this.externalResourcesRequired;";
+  _SVGAnimatedBooleanJs get externalResourcesRequired() native "return this.externalResourcesRequired;";
 }