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

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

Index: client/dom/generated/src/frog/SVGFEFloodElement.dart
diff --git a/client/dom/generated/src/frog/SVGFEFloodElement.dart b/client/dom/generated/src/frog/SVGFEFloodElement.dart
index 509ffa4851a914cf4f4d1d62731450a6bfc5e98c..91f6e8702fa89a80f1ef5462cef0d8ae225e7d6c 100644
--- a/client/dom/generated/src/frog/SVGFEFloodElement.dart
+++ b/client/dom/generated/src/frog/SVGFEFloodElement.dart
@@ -1,23 +1,23 @@
 
-class SVGFEFloodElementJs extends SVGElementJs implements SVGFEFloodElement native "*SVGFEFloodElement" {
+class _SVGFEFloodElementJs extends _SVGElementJs implements SVGFEFloodElement native "*SVGFEFloodElement" {
 
   // From SVGFilterPrimitiveStandardAttributes
 
-  SVGAnimatedLengthJs get height() native "return this.height;";
+  _SVGAnimatedLengthJs get height() native "return this.height;";
 
-  SVGAnimatedStringJs get result() native "return this.result;";
+  _SVGAnimatedStringJs get result() native "return this.result;";
 
-  SVGAnimatedLengthJs get width() native "return this.width;";
+  _SVGAnimatedLengthJs get width() native "return this.width;";
 
-  SVGAnimatedLengthJs get x() native "return this.x;";
+  _SVGAnimatedLengthJs get x() native "return this.x;";
 
-  SVGAnimatedLengthJs get y() native "return this.y;";
+  _SVGAnimatedLengthJs get y() native "return this.y;";
 
   // From SVGStylable
 
-  SVGAnimatedStringJs get className() native "return this.className;";
+  _SVGAnimatedStringJs get className() native "return this.className;";
 
-  CSSStyleDeclarationJs get style() native "return this.style;";
+  _CSSStyleDeclarationJs get style() native "return this.style;";
 
-  CSSValueJs getPresentationAttribute(String name) native;
+  _CSSValueJs getPresentationAttribute(String name) native;
 }