async fn delete_expression(
        &self,
        input: DeleteExpressionRequest,
    ) -> Result<DeleteExpressionResponse, RusotoError<DeleteExpressionError>> {
        let mut request = SignedRequest::new("POST", "cloudsearch", &self.region, "/");
        let params = self.new_params("DeleteExpression");
        let mut params = params;
        DeleteExpressionRequestSerializer::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, DeleteExpressionError::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 =
                DeleteExpressionResponseDeserializer::deserialize("DeleteExpressionResult", stack)?;
            skip_tree(stack);
            xml_util::end_element(actual_tag_name, stack)?;
            Ok(result)
        })
        .await?;

        drop(response); // parse non-payload
        Ok(result)
    }
<p>Removes an <code><a>Expression</a></code> from the search domain. For more information, see <a href="http://docs.aws.amazon.com/cloudsearch/latest/developerguide/configuring-expressions.html" target="_blank">Configuring Expressions</a> in the <i>Amazon CloudSearch Developer Guide</i>.</p>
rusoto/services/cloudsearch/src/generated.rs