How to use the azure-mgmt-eventgrid.azure.mgmt.eventgrid.models.TopicUpdateParameters function in azure-mgmt-eventgrid

def _update_initial(
            self, resource_group_name, topic_name, tags=None, custom_headers=None, raw=False, **operation_config):
        topic_update_parameters = models.TopicUpdateParameters(tags=tags)

        # Construct URL
        url = self.update.metadata['url']
        path_format_arguments = {
            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str'),
            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
            'topicName': self._serialize.url("topic_name", topic_name, 'str')
        }
        url = self._client.format_url(url, **path_format_arguments)

        # Construct parameters
        query_parameters = {}
        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')

        # Construct headers
        header_parameters = {}