code: def addSourceId(self, value):
          '''Adds SourceId to External_Info
          '''
          if isinstance(value, Source_Id):
              self.source_ids.append(value)
          else:
              raise (TypeError,
                     'source_id Type should be Source_Id, not %s' % type(source_id)f addSourceId(self, value):
          '''Adds SourceId to External_Info
          '''
          if isinstance(value, Source_Id):
              self.source_ids.append(value)
          else:
              raise (TypeError,
                     'source_id Type should be Source_Id, not %s' % type(source_id))
docs: Adds SourceId to External_Info