| transferBatch | The WorldAnchorTransferBatch to export into a byte buffer. |
| onDataAvailable | The callback when some data is available. |
| onCompleted | The callback after the last bit of data was provided via onDataAvailable with a completion reason (success or failure reason). |
Exports the input WorldAnchorTransferBatch into a byte array which can be passed to WorldAnchorTransferBatch.ImportAsync to restore the original WorldAnchorTransferBatch.