TransferableTypedData class Null safety
An efficiently transferable sequence of byte values.
A TransferableTypedData is created from a number of bytes. This will take time proportional to the number of bytes.
The TransferableTypedData can be moved between isolates, so sending it through a send port will only take constant time.
When sent this way, the local transferable can no longer be materialized, and the received object is now the only way to materialize the data.