Rename setParentData to setupParentData since it's not a setter per se.

sky/sdk/lib/rendering/stack.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:math' as math;
 
 import 'box.dart';
 import 'object.dart';
 
 class StackParentData extends BoxParentData with ContainerParentDataMixin<RenderBox> {
@@ skipping 20 matching lines @@
 }
 
 class RenderStack extends RenderBox with ContainerRenderObjectMixin<RenderBox, StackParentData>,
                                          RenderBoxContainerDefaultsMixin<RenderBox, StackParentData> {
   RenderStack({
     List<RenderBox> children
   }) {
     addAll(children);
   }
 
-  void setParentData(RenderBox child) {
+  void setupParentData(RenderBox child) {
     if (child.parentData is! StackParentData)
       child.parentData = new StackParentData();
   }
 
 
   double getMinIntrinsicWidth(BoxConstraints constraints) {
     double width = constraints.minWidth;
     RenderBox child = firstChild;
     while (child != null) {
       assert(child.parentData is StackParentData);
@@ skipping 141 matching lines @@
   }
 
   void hitTestChildren(HitTestResult result, { Point position }) {
     defaultHitTestChildren(result, position: position);
   }
 
   void paint(RenderCanvas canvas) {
     defaultPaint(canvas);
   }
 }