Passthrough helper to the current VM class.

def create_unsigned_transaction(self,
                                    *,
                                    nonce: int,
                                    gas_price: int,
                                    gas: int,
                                    to: Address,
                                    value: int,
                                    data: bytes) -> BaseUnsignedTransaction:
        """
        Passthrough helper to the current VM class.
        """
        return self.get_vm().create_unsigned_transaction(
            nonce=nonce,
            gas_price=gas_price,
            gas=gas,
            to=to,
            value=value,
            data=data,
        )