code: def container_size(self):
          
          length = 0
          for name, item in enumerate(self):
              # Container
              if is_container(item):
                  byte_length, bit_length = item.container_size()
                  length += bit_length + byte_length * 8
              # Field
              elif is_field(item):
                  length += item.bit_size
              else:
                  raise MemberTypeError(self, item, name)
          return divmod(length, 8)
docs: Returns the accumulated bit size of all fields in the `Sequence` as
          a tuple in the form of ``(number of bytes, remaining number of bits)``.