saveState method
Saves the current hash computation state into a serializable state object.
This method saves the current state of the hash computation, including the data buffer,
hash state, and etc, into a serializable state object.
The saved state can be later restored using the restoreState
method.
Returns a HashState object containing the saved state information.
Implementation
@override
HashState saveState() {
return _inner.saveState();
}