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

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

 
-class SVGFEMorphologyElementJs extends SVGElementJs implements SVGFEMorphologyElement native "*SVGFEMorphologyElement" {
+class _SVGFEMorphologyElementJs extends _SVGElementJs implements SVGFEMorphologyElement native "*SVGFEMorphologyElement" {
 
   static final int SVG_MORPHOLOGY_OPERATOR_DILATE = 2;
 
   static final int SVG_MORPHOLOGY_OPERATOR_ERODE = 1;
 
   static final int SVG_MORPHOLOGY_OPERATOR_UNKNOWN = 0;
 
-  SVGAnimatedStringJs get in1() native "return this.in1;";
+  _SVGAnimatedStringJs get in1() native "return this.in1;";
 
-  SVGAnimatedEnumerationJs get operator() native "return this.operator;";
+  _SVGAnimatedEnumerationJs get operator() native "return this.operator;";
 
-  SVGAnimatedNumberJs get radiusX() native "return this.radiusX;";
+  _SVGAnimatedNumberJs get radiusX() native "return this.radiusX;";
 
-  SVGAnimatedNumberJs get radiusY() native "return this.radiusY;";
+  _SVGAnimatedNumberJs get radiusY() native "return this.radiusY;";
 
   void setRadius(num radiusX, num radiusY) native;
 
   // 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;
 }