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

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

 
-class SVGGlyphRefElementJs extends SVGElementJs implements SVGGlyphRefElement native "*SVGGlyphRefElement" {
+class _SVGGlyphRefElementJs extends _SVGElementJs implements SVGGlyphRefElement native "*SVGGlyphRefElement" {
 
   num get dx() native "return this.dx;";
 
   void set dx(num value) native "this.dx = value;";
 
   num get dy() native "return this.dy;";
 
   void set dy(num value) native "this.dy = value;";
 
   String get format() native "return this.format;";
 
   void set format(String value) native "this.format = value;";
 
   String get glyphRef() native "return this.glyphRef;";
 
   void set glyphRef(String value) native "this.glyphRef = value;";
 
   num get x() native "return this.x;";
 
   void set x(num value) native "this.x = value;";
 
   num get y() native "return this.y;";
 
   void set y(num value) native "this.y = value;";
 
   // From SVGURIReference
 
-  SVGAnimatedStringJs get href() native "return this.href;";
+  _SVGAnimatedStringJs get href() native "return this.href;";
 
   // 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;
 }