code: def create_draft_for_edit_extension(self, publisher_name, extension_name):
          
          route_values = {}
          if publisher_name is not None:
              route_values['publisherName'] = self._serialize.url('publisher_name', publisher_name, 'str')
          if extension_name is not None:
              route_values['extensionName'] = self._serialize.url('extension_name', extension_name, 'str')
          response = self._send(http_method='POST',
                                location_id='02b33873-4e61-496e-83a2-59d1df46b7d8',
                                version='5.0-preview.1',
                                route_values=route_values)
          return self._deserialize('ExtensionDraft', response)
docs: CreateDraftForEditExtension.
          [Preview API]
          :param str publisher_name:
          :param str extension_name:
          :rtype: :class:`<ExtensionDraft> <azure.devops.v5_0.gallery.models.ExtensionDraft>`