code: def AddMemberDefinition(self, member_definition):
      
      self._byte_size = None
      self.members.append(member_definition)
  
      if self.sections:
        section_definition = self.sections[-1]
        section_definition.members.append(member_definition)
docs: Adds a member definition.
  
      Args:
        member_definition (DataTypeDefinition): member data type definition.