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

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

Index: client/dom/generated/src/frog/SVGFilterPrimitiveStandardAttributes.dart
diff --git a/client/dom/generated/src/frog/SVGFilterPrimitiveStandardAttributes.dart b/client/dom/generated/src/frog/SVGFilterPrimitiveStandardAttributes.dart
index efd307a07e4646fa7b75466bed3f02fa8673840a..8d59e1de07945d5c52720b1cd7c9d99a9a948809 100644
--- a/client/dom/generated/src/frog/SVGFilterPrimitiveStandardAttributes.dart
+++ b/client/dom/generated/src/frog/SVGFilterPrimitiveStandardAttributes.dart
@@ -1,13 +1,13 @@
 
-class SVGFilterPrimitiveStandardAttributesJs extends SVGStylableJs implements SVGFilterPrimitiveStandardAttributes native "*SVGFilterPrimitiveStandardAttributes" {
+class _SVGFilterPrimitiveStandardAttributesJs extends _SVGStylableJs implements SVGFilterPrimitiveStandardAttributes native "*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;";
 }