code: def add_definition_tags(self, tags, project, definition_id):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if definition_id is not None:
              route_values['definitionId'] = self._serialize.url('definition_id', definition_id, 'int')
          content = self._serialize.body(tags, '[str]')
          response = self._send(http_method='POST',
                                location_id='cb894432-134a-4d31-a839-83beceaace4b',
                                version='5.0-preview.2',
                                route_values=route_values,
                                content=content)
          return self._deserialize('[str]', self._unwrap_collection(response))
docs: AddDefinitionTags.
          [Preview API] Adds multiple tags to a definition.
          :param [str] tags: The tags to add.
          :param str project: Project ID or project name
          :param int definition_id: The ID of the definition.
          :rtype: [str]