code: def Size(self):
          
          # Items should be an array of type CoinState, not of ints!
          corrected_items = list(map(lambda i: CoinState(i), self.Items))
          return super(UnspentCoinState, self).Size() + GetVarSize(corrected_items)
docs: Get the total size in bytes of the object.
  
          Returns:
              int: size.