code: def flat(self, obj, mask=0):
          '''Return the aligned flat size.
          '''
          s = self.base
          if self.leng and self.item > 0:  # include items
              s += self.leng(obj) * self.item
          if _getsizeof:  # _getsizeof prevails
              s = _getsizeof(obj, s)
          if mask:  # align
              s = (s + mask) & ~mask
          return f flat(self, obj, mask=0):
          '''Return the aligned flat size.
          '''
          s = self.base
          if self.leng and self.item > 0:  # include items
              s += self.leng(obj) * self.item
          if _getsizeof:  # _getsizeof prevails
              s = _getsizeof(obj, s)
          if mask:  # align
              s = (s + mask) & ~mask
          return s
docs: Return the aligned flat size.