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

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

Index: client/dom/generated/src/frog/SVGElementInstance.dart
diff --git a/client/dom/generated/src/frog/SVGElementInstance.dart b/client/dom/generated/src/frog/SVGElementInstance.dart
index c0240c66ba2d67d37ef656a3ae7cf4157b594e4e..bc0e5d7e1149a74348a083b9022b2ddd20d2cc99 100644
--- a/client/dom/generated/src/frog/SVGElementInstance.dart
+++ b/client/dom/generated/src/frog/SVGElementInstance.dart
@@ -1,25 +1,25 @@
 
-class SVGElementInstanceJs extends DOMTypeJs implements SVGElementInstance native "*SVGElementInstance" {
+class _SVGElementInstanceJs extends _DOMTypeJs implements SVGElementInstance native "*SVGElementInstance" {
 
-  SVGElementInstanceListJs get childNodes() native "return this.childNodes;";
+  _SVGElementInstanceListJs get childNodes() native "return this.childNodes;";
 
-  SVGElementJs get correspondingElement() native "return this.correspondingElement;";
+  _SVGElementJs get correspondingElement() native "return this.correspondingElement;";
 
-  SVGUseElementJs get correspondingUseElement() native "return this.correspondingUseElement;";
+  _SVGUseElementJs get correspondingUseElement() native "return this.correspondingUseElement;";
 
-  SVGElementInstanceJs get firstChild() native "return this.firstChild;";
+  _SVGElementInstanceJs get firstChild() native "return this.firstChild;";
 
-  SVGElementInstanceJs get lastChild() native "return this.lastChild;";
+  _SVGElementInstanceJs get lastChild() native "return this.lastChild;";
 
-  SVGElementInstanceJs get nextSibling() native "return this.nextSibling;";
+  _SVGElementInstanceJs get nextSibling() native "return this.nextSibling;";
 
-  SVGElementInstanceJs get parentNode() native "return this.parentNode;";
+  _SVGElementInstanceJs get parentNode() native "return this.parentNode;";
 
-  SVGElementInstanceJs get previousSibling() native "return this.previousSibling;";
+  _SVGElementInstanceJs get previousSibling() native "return this.previousSibling;";
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
-  bool dispatchEvent(EventJs event) native;
+  bool dispatchEvent(_EventJs event) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 }