async fn reset_db_parameter_group(
        &self,
        input: ResetDBParameterGroupMessage,
    ) -> Result<DBParameterGroupNameMessage, RusotoError<ResetDBParameterGroupError>> {
        let mut request = SignedRequest::new("POST", "rds", &self.region, "/");
        let params = self.new_params("ResetDBParameterGroup");
        let mut params = params;
        ResetDBParameterGroupMessageSerializer::serialize(&mut params, "", &input);
        request.set_payload(Some(serde_urlencoded::to_string(&params).unwrap()));
        request.set_content_type("application/x-www-form-urlencoded".to_owned());

        let response = self
            .sign_and_dispatch(request, ResetDBParameterGroupError::from_response)
            .await?;

        let mut response = response;
        let result = xml_util::parse_response(&mut response, |actual_tag_name, stack| {
            xml_util::start_element(actual_tag_name, stack)?;
            let result = DBParameterGroupNameMessageDeserializer::deserialize(
                "ResetDBParameterGroupResult",
                stack,
            )?;
            skip_tree(stack);
            xml_util::end_element(actual_tag_name, stack)?;
            Ok(result)
        })
        .await?;

        drop(response); // parse non-payload
        Ok(result)
    }
<p>Modifies the parameters of a DB parameter group to the engine/system default value. To reset specific parameters, provide a list of the following: <code>ParameterName</code> and <code>ApplyMethod</code>. To reset the entire DB parameter group, specify the <code>DBParameterGroup</code> name and <code>ResetAllParameters</code> parameters. When resetting the entire group, dynamic parameters are updated immediately and static parameters are set to <code>pending-reboot</code> to take effect on the next DB instance restart or <code>RebootDBInstance</code> request.</p>
rusoto/services/neptune/src/generated.rs