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

sky/examples/rendering/sector_layout.dart

Index: sky/examples/rendering/sector_layout.dart
diff --git a/sky/examples/rendering/sector_layout.dart b/sky/examples/rendering/sector_layout.dart
index b17b31b98cee3d9d61ebcfbfed6565fe313be2c4..faf519d179c7a24d6482d2b33c188de82917b9b1 100644
--- a/sky/examples/rendering/sector_layout.dart
+++ b/sky/examples/rendering/sector_layout.dart
@@ -65,7 +65,7 @@ class SectorParentData extends ParentData {
 
 abstract class RenderSector extends RenderObject {
 
-  void setParentData(RenderObject child) {
+  void setupParentData(RenderObject child) {
     if (child.parentData is! SectorParentData)
       child.parentData = new SectorParentData();
   }
@@ -186,7 +186,7 @@ class RenderSectorRing extends RenderSectorWithChildren {
     }
   }
 
-  void setParentData(RenderObject child) {
+  void setupParentData(RenderObject child) {
     // TODO(ianh): avoid code duplication
     if (child.parentData is! SectorChildListParentData)
       child.parentData = new SectorChildListParentData();
@@ -296,7 +296,7 @@ class RenderSectorSlice extends RenderSectorWithChildren {
     }
   }
 
-  void setParentData(RenderObject child) {
+  void setupParentData(RenderObject child) {
     // TODO(ianh): avoid code duplication
     if (child.parentData is! SectorChildListParentData)
       child.parentData = new SectorChildListParentData();
@@ -396,7 +396,7 @@ class RenderBoxToRenderSectorAdapter extends RenderBox {
     markNeedsLayout();
   }
 
-  void setParentData(RenderObject child) {
+  void setupParentData(RenderObject child) {
     if (child.parentData is! SectorParentData)
       child.parentData = new SectorParentData();
   }