NativeSlice unsafe utility class.
| ConvertExistingDataToNativeSlice | ConvertExistingDataToNativeSlice. |
| GetAtomicSafetyHandle | Get safety handle for native slice. |
| GetUnsafePtr | Get NativeSlice memory buffer pointer. Checks whether the native array can be written to. |
| GetUnsafeReadOnlyPtr | Get NativeSlice memory buffer pointer. Checks whether the native array can be read from. |
| SetAtomicSafetyHandle | Set safetly handle on NativeSlice. |