public static UnsafeListStruct <T> AsStruct <T>(this UnsafeList <T> source) => new UnsafeListStruct <T>(source);
public FastUncheckedRectInt32ArrayWrapper(UnsafeList <RectInt32> list) : this(list, 0, list.Count) { }
public UnsafeListStruct(UnsafeList <T> source) { this.source = source; }