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

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

 
-class EventJs extends DOMTypeJs implements Event native "*Event" {
+class _EventJs extends _DOMTypeJs implements Event native "*Event" {
 
   static final int AT_TARGET = 2;
 
   static final int BLUR = 8192;
 
   static final int BUBBLING_PHASE = 3;
 
   static final int CAPTURING_PHASE = 1;
 
   static final int CHANGE = 32768;
@@ skipping 27 matching lines @@
   static final int SELECT = 16384;
 
   bool get bubbles() native "return this.bubbles;";
 
   bool get cancelBubble() native "return this.cancelBubble;";
 
   void set cancelBubble(bool value) native "this.cancelBubble = value;";
 
   bool get cancelable() native "return this.cancelable;";
 
-  ClipboardJs get clipboardData() native "return this.clipboardData;";
+  _ClipboardJs get clipboardData() native "return this.clipboardData;";
 
-  EventTargetJs get currentTarget() native "return this.currentTarget;";
+  _EventTargetJs get currentTarget() native "return this.currentTarget;";
 
   bool get defaultPrevented() native "return this.defaultPrevented;";
 
   int get eventPhase() native "return this.eventPhase;";
 
   bool get returnValue() native "return this.returnValue;";
 
   void set returnValue(bool value) native "this.returnValue = value;";
 
-  EventTargetJs get srcElement() native "return this.srcElement;";
+  _EventTargetJs get srcElement() native "return this.srcElement;";
 
-  EventTargetJs get target() native "return this.target;";
+  _EventTargetJs get target() native "return this.target;";
 
   int get timeStamp() native "return this.timeStamp;";
 
   String get type() native "return this.type;";
 
   void initEvent(String eventTypeArg, bool canBubbleArg, bool cancelableArg) native;
 
   void preventDefault() native;
 
   void stopImmediatePropagation() native;
 
   void stopPropagation() native;
 }