code: def GetByteSize(self):
      
      if self._byte_size is None and self.members:
        self._byte_size = 0
        for member_definition in self.members:
          byte_size = member_definition.GetByteSize()
          if byte_size is None:
            self._byte_size = None
            break
  
          self._byte_size = max(self._byte_size, byte_size)
  
      return self._byte_size
docs: Retrieves the byte size of the data type definition.
  
      Returns:
        int: data type size in bytes or None if size cannot be determined.