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

sky/sdk/lib/rendering/box.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 'dart:sky' as sky;
 
 import 'package:vector_math/vector_math.dart';
 
 import '../base/debug.dart';
@@ skipping 215 matching lines @@
     assert(RenderObject.debugDoingLayout);
     _position = value;
   }
   String toString() => 'position=$position';
 }
 
 enum TextBaseline { alphabetic, ideographic }
 
 abstract class RenderBox extends RenderObject {
 
-  void setParentData(RenderObject child) {
+  void setupParentData(RenderObject child) {
     if (child.parentData is! BoxParentData)
       child.parentData = new BoxParentData();
   }
 
   // getMinIntrinsicWidth() should return the minimum width that this box could
   // be without failing to render its contents within itself.
   double getMinIntrinsicWidth(BoxConstraints constraints) {
     return constraints.constrainWidth(0.0);
   }
 
@@ skipping 984 matching lines @@
 
   void defaultPaint(RenderCanvas canvas) {
     RenderBox child = firstChild;
     while (child != null) {
       assert(child.parentData is ParentDataType);
       canvas.paintChild(child, child.parentData.position);
       child = child.parentData.nextSibling;
     }
   }
 }