Added Prerelease sample.

samples/HelloWorld/Assets/Prefabs/GoogleMobileAds.prefab

@@ -34,7 +34,6 @@ RectTransform:
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   - {fileID: 7547914932026193986}
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   m_AnchorMax: {x: 1, y: 0}
@@ -140,7 +139,6 @@ RectTransform:
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   m_Children: []
   m_Father: {fileID: 7547914931805673037}
-  m_RootOrder: 5
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 0}
@@ -214,13 +212,13 @@ Transform:
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   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 7547914931092588424}
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   m_LocalScale: {x: 1, y: 1, z: 1}
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   m_Children: []
   m_Father: {fileID: 7547914931805673037}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
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 MonoBehaviour:
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   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 7547914931357196110}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
@@ -364,7 +361,6 @@ RectTransform:
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   m_Children: []
   m_Father: {fileID: 7547914931805673037}
-  m_RootOrder: 2
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
@@ -439,7 +435,6 @@ RectTransform:
   m_Children:
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   m_Father: {fileID: 7547914932026193986}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
@@ -477,7 +472,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 7547914931805673037}
-  m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 1}
   m_AnchorMax: {x: 1, y: 1}
@@ -561,7 +555,6 @@ RectTransform:
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   m_Father: {fileID: 0}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
@@ -585,7 +578,9 @@ Canvas:
   m_OverrideSorting: 0
   m_OverridePixelPerfect: 0
   m_SortingBucketNormalizedSize: 0
+  m_VertexColorAlwaysGammaSpace: 0
   m_AdditionalShaderChannelsFlag: 0
+  m_UpdateRectTransformForStandalone: 0
   m_SortingLayerID: 0
   m_SortingOrder: 0
   m_TargetDisplay: 0
@@ -662,12 +657,11 @@ RectTransform:
   m_Children:
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   m_Father: {fileID: 7547914930684843822}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 1, y: 0}
   m_AnchorMax: {x: 1, y: 1}
   m_AnchoredPosition: {x: 0, y: 0}
-  m_SizeDelta: {x: 40, y: -17}
+  m_SizeDelta: {x: 20, y: -17}
   m_Pivot: {x: 1, y: 1}
 --- !u!222 &7547914932026193991
 CanvasRenderer:
@@ -788,12 +782,11 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 7547914932589224673}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 1}
   m_AnchorMax: {x: 1, y: 1}
-  m_AnchoredPosition: {x: 2, y: -296.91815}
-  m_SizeDelta: {x: -4, y: 0}
+  m_AnchoredPosition: {x: 2, y: -300.00006}
+  m_SizeDelta: {x: -4, y: 20.059858}
   m_Pivot: {x: 0.5, y: 0}
 --- !u!222 &7547914932056881332
 CanvasRenderer:
@@ -884,7 +877,6 @@ RectTransform:
   m_Children:
   - {fileID: 7547914932419267462}
   m_Father: {fileID: 7547914931805673037}
-  m_RootOrder: 4
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 1, y: 1}
   m_AnchorMax: {x: 1, y: 1}
@@ -1000,13 +992,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 7547914932357220659}
+  serializedVersion: 2
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: -10}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 7547914931805673037}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!20 &7547914932357220662
 Camera:
@@ -1022,9 +1014,17 @@ Camera:
   m_projectionMatrixMode: 1
   m_GateFitMode: 2
   m_FOVAxisMode: 0
+  m_Iso: 200
+  m_ShutterSpeed: 0.005
+  m_Aperture: 16
+  m_FocusDistance: 10
+  m_FocalLength: 50
+  m_BladeCount: 5
+  m_Curvature: {x: 2, y: 11}
+  m_BarrelClipping: 0.25
+  m_Anamorphism: 0
   m_SensorSize: {x: 36, y: 24}
   m_LensShift: {x: 0, y: 0}
-  m_FocalLength: 50
   m_NormalizedViewPortRect:
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     x: 0
@@ -1098,7 +1098,6 @@ RectTransform:
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 7547914932158262828}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
@@ -1180,7 +1179,6 @@ RectTransform:
   m_Children:
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   m_Father: {fileID: 7547914930684843822}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}

samples/HelloWorld/Assets/Prefabs/MenuButton.prefab

@@ -0,0 +1,225 @@
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+  m_Name: Text
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
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+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
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+  m_AnchorMax: {x: 1, y: 1}
+  m_AnchoredPosition: {x: 0, y: 0}
+  m_SizeDelta: {x: 0, y: 0}
+  m_Pivot: {x: 0.5, y: 0.5}
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+    m_LineSpacing: 1
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+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
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