immutable

功能描述： Immutable is only legal in Object.h and is being phased out, do not use on new structs!
元数据类型： bool
引擎模块： Serialization
作用机制： 在StructFlags中加入STRUCT_Immutable

当前只在noexporttypes.h里找到一堆Struct

指定这个结构的字段已经定义完毕，以后不会再修改，因此可以UseBinarySerialization来序列化，不需要支持字段的增删。

//USTRUCT(BlueprintType,Immutable)	//error : Immutable is being phased out in favor of SerializeNative, and is only legal on the mirror structs declared in UObject
//struct INSIDER_API FMyStruct_Immutable
//{
//	GENERATED_BODY()
//
//	UPROPERTY(BlueprintReadWrite,EditAnywhere)
//	float Score;
//
//};

Struct[67] WithFlags:STRUCT_Immutable 
Struct:	ScriptStruct /Script/CoreUObject.Guid
Struct:	ScriptStruct /Script/CoreUObject.DateTime
Struct:	ScriptStruct /Script/CoreUObject.Box
Struct:	ScriptStruct /Script/CoreUObject.Vector
Struct:	ScriptStruct /Script/CoreUObject.Box2D
Struct:	ScriptStruct /Script/CoreUObject.Vector2D
Struct:	ScriptStruct /Script/CoreUObject.Box2f
Struct:	ScriptStruct /Script/CoreUObject.Vector2f
Struct:	ScriptStruct /Script/CoreUObject.Box3d
Struct:	ScriptStruct /Script/CoreUObject.Vector3d
Struct:	ScriptStruct /Script/CoreUObject.Box3f
Struct:	ScriptStruct /Script/CoreUObject.Vector3f
Struct:	ScriptStruct /Script/CoreUObject.Color
Struct:	ScriptStruct /Script/CoreUObject.Int32Point
Struct:	ScriptStruct /Script/CoreUObject.Int32Vector
Struct:	ScriptStruct /Script/CoreUObject.Int32Vector2
Struct:	ScriptStruct /Script/CoreUObject.Int32Vector4
Struct:	ScriptStruct /Script/CoreUObject.Int64Point
Struct:	ScriptStruct /Script/CoreUObject.Int64Vector
Struct:	ScriptStruct /Script/CoreUObject.Int64Vector2
Struct:	ScriptStruct /Script/CoreUObject.Int64Vector4
Struct:	ScriptStruct /Script/CoreUObject.LinearColor
Struct:	ScriptStruct /Script/CoreUObject.Quat
Struct:	ScriptStruct /Script/CoreUObject.TwoVectors
Struct:	ScriptStruct /Script/CoreUObject.IntPoint
Struct:	ScriptStruct /Script/CoreUObject.IntVector
Struct:	ScriptStruct /Script/CoreUObject.IntVector2
Struct:	ScriptStruct /Script/CoreUObject.IntVector4
Struct:	ScriptStruct /Script/CoreUObject.Matrix
Struct:	ScriptStruct /Script/CoreUObject.Plane
Struct:	ScriptStruct /Script/CoreUObject.Matrix44d
Struct:	ScriptStruct /Script/CoreUObject.Plane4d
Struct:	ScriptStruct /Script/CoreUObject.Matrix44f
Struct:	ScriptStruct /Script/CoreUObject.Plane4f
Struct:	ScriptStruct /Script/CoreUObject.OrientedBox
Struct:	ScriptStruct /Script/CoreUObject.PackedNormal
Struct:	ScriptStruct /Script/CoreUObject.PackedRGB10A2N
Struct:	ScriptStruct /Script/CoreUObject.PackedRGBA16N
Struct:	ScriptStruct /Script/CoreUObject.Quat4d
Struct:	ScriptStruct /Script/CoreUObject.Quat4f
Struct:	ScriptStruct /Script/CoreUObject.Ray
Struct:	ScriptStruct /Script/CoreUObject.Ray3d
Struct:	ScriptStruct /Script/CoreUObject.Ray3f
Struct:	ScriptStruct /Script/CoreUObject.Rotator
Struct:	ScriptStruct /Script/CoreUObject.Rotator3d
Struct:	ScriptStruct /Script/CoreUObject.Rotator3f
Struct:	ScriptStruct /Script/CoreUObject.Sphere
Struct:	ScriptStruct /Script/CoreUObject.Sphere3d
Struct:	ScriptStruct /Script/CoreUObject.Sphere3f
Struct:	ScriptStruct /Script/CoreUObject.Timespan
Struct:	ScriptStruct /Script/CoreUObject.Transform3d
Struct:	ScriptStruct /Script/CoreUObject.Transform3f
Struct:	ScriptStruct /Script/CoreUObject.Uint32Point
Struct:	ScriptStruct /Script/CoreUObject.Uint32Vector
Struct:	ScriptStruct /Script/CoreUObject.Uint32Vector2
Struct:	ScriptStruct /Script/CoreUObject.Uint32Vector4
Struct:	ScriptStruct /Script/CoreUObject.Uint64Point
Struct:	ScriptStruct /Script/CoreUObject.Uint64Vector
Struct:	ScriptStruct /Script/CoreUObject.Uint64Vector2
Struct:	ScriptStruct /Script/CoreUObject.Uint64Vector4
Struct:	ScriptStruct /Script/CoreUObject.UintPoint
Struct:	ScriptStruct /Script/CoreUObject.UintVector
Struct:	ScriptStruct /Script/CoreUObject.UintVector2
Struct:	ScriptStruct /Script/CoreUObject.UintVector4
Struct:	ScriptStruct /Script/CoreUObject.Vector4
Struct:	ScriptStruct /Script/CoreUObject.Vector4d
Struct:	ScriptStruct /Script/CoreUObject.Vector4f

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immutable

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