code: def create_unsigned_transaction(cls,
                                      *,
                                      nonce: int,
                                      gas_price: int,
                                      gas: int,
                                      to: Address,
                                      value: int,
                                      data: bytes) -> 'BaseUnsignedTransaction':
          
          raise NotImplementedError("Must be implemented by subclasses")
docs: Create an unsigned transaction.